oSIST prEN 12355:2020

Food processing machinery - Derinding-, skinning- and membrane removal machines - Safety and hygiene requirements

This document deals with all significant hazards, hazardous situations and events relevant to derinding , skinning- and membrane removal machines, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4).
This document deals with the hazards which can arise during commissioning, operation, cleaning, use, maintenance and decommissioning of the machine.
The machines described in this standard are used for derinding-, skinning- and membrane removal of meat and fish by cutting at a straight blade and/or cutting with circular blades. Feeding could be done manually or automatically.
Using open derinding-, skinning- and membrane removal machines, the product is guided by hand towards the cutting device.
With automatic derinding-, skinning and membrane removal machines the product is transported by an infeed conveyor against the cutting device. Product with a weight > 25 kg has to be processed by an automatic machine.
Derinding-, skinning-, and membrane removal machines for domestic purposes, hand-guided machines and table-top machines are not covered by this standard.
This document only applies to machines which are manufactured after the date of issue of this document.
This document covers the following types of machines:
a)   open derinding machines (see Figure 1 and Figure 2) with infeed table and a distance h between the standing position and the surface of the infeed table from 800 mm to 1 050 mm. The cutting thickness shall be t ≤ 5 mm;
b)   open skinning- and membrane removal machines (see Figure 1 and Figure 3) with infeed table and a distance h between the standing position and the surface of the infeed table from 800 mm to 1 050 mm. The cutting thickness shall be t ≤ 0,5 mm.
Key
1   tooth/transport roller   6   foot switch
2   cutting device   7   drive
3   outfeed table   8   sliding plate
4   infeed table   h   table height
5   ON-/OFF-switch       
Figure 1 - Open derinding-, skinning- and membrane removal machine
Key
1   product   6   removed product (rind, skin, membrane)
2   infeed table   7   stripper comb
3   blade holder   8   transport roller
4   tooth roller   9   stripper roller
5   straight blade   t   cutting thickness
Figure 2 - System of an open derinding machine
Key
1   product   6   removed product (rind, skin, membrane)
2   infeed table   7   stripper comb
3   blade holder   8   transport roller
4   tooth roller   9   stripper roller
5   straight blade   t   cutting thickness
Figure 3 - System of an open membrane removal machine
c)   Automatic machines (see Figure 4 and Figure 5), which are charged by an operator, with a distance between the standing position and the surface of the infeed conveyor between 800 mm and 1 050 mm.
Automatic machines which are charged automatically and are integrated in dismantling lines do not have to follow the requirements on the height of the surface of the infeed conveyor (800 mm to 1 050 mm) because the ergonomic matters need not be considered.
Automatic machines could be equipped with different rolls (see Figure 6).
Key
1   outfeed conveyor   5   tooth / transport roller
2   tunnel shaped guard   6   infeed conveyor
3   hold-down roller, blade roller, combined roller   7   drive
4   cutting device   8   sliding plate
Figure 4 - Automatic machine
Key
1   hold-down roller, blade roller, combined roller   5   stripper comb / roller
2   infeed conveyor   6   cutting device
3   product   7   outfeed conveyor
4   tooth / transport roller   8   hold-down roller, blade roller, combined roller (optional)
Figure 5 - System of an automatic machine
a)   hold-down rolls (divided)
b)   hold-down rolls (undivided)
c)   blade roller (divided)   d)   combined roller (divided)
Figure 6 - Examples of rolls
d)   Combining machines are designed to be used as automatic or open machines.
Derinding-, skinning- and membrane removal machines consist mainly of a machine frame, tooth roller with stripper comb, hold-down roller with stripper rake, transport roller with stripper roller, cutting

Nahrungsmittelmaschinen - Entschwartungs-, Enthäutungs- und Entvliesmaschinen - Sicherheits- und Hygieneanforderungen

Dieses Dokument behandelt alle signifikanten Gefährdungen, Gefährdungssituationen und Gefährdungsereignisse, die auf Entschwartungs-, Enthäutungs- und Entvliesmaschinen zutreffen, wenn sie bestimmungsgemäß und unter Bedingungen von durch den Hersteller vernünftigerweise vorhersehbaren Fehlanwendungen verwendet werden (siehe Abschnitt 4).
Dieses Dokument behandelt die Gefährdungen, die während Inbetriebnahme, Betrieb, Reinigung, Nutzung, Wartung und Außerbetriebnahme der Maschine auftreten können.
Die von dieser Norm erfassten Maschinen werden für das Entschwarten, Enthäuten und Entvliesen von Fleisch und Fisch durch Trennen mit geraden und/oder kreisförmigen Messereinrichtungen verwendet. Die Zuführung kann manuell oder automatisch erfolgen.
Bei offenen Entschwartungs-, Enthäutungs-und Entvliesmaschinen wird das Produkt von Hand der Schneideinrichtung zugeführt.
Bei automatischen Entschwartungs-, Enthäutungs- und Entvliesmaschinen wird das Produkt über ein Zuführungsband der Schneideinrichtung zugeführt. Produkte mit einem Gewicht von > 25 kg müssen von einer automatischen Maschine verarbeitet werden.
Entschwartungs-, Enthäutungs- und Entvliesmaschinen für den Hausgebrauch sowie handgeführte und Tischmaschinen werden von dieser Norm nicht abgedeckt.
Dieses Dokument gilt nur für Maschinen, die nach dem Ausgabedatum dieses Dokuments hergestellt werden.
Dieses Dokument umfasst folgende Bauarten von Maschinen:
a)   offene Entschwartungsmaschinen (siehe Bild 1 und Bild 2) mit Zuführtisch und einem Abstand h zwischen der Standposition und der Oberfläche des Zuführtischs zwischen 800 mm und 1 050 mm. Die Schneiddicke t muss ≤ 5 mm betragen;
b)   offene Enthäutungs- und Entvliesmaschinen (siehe Bild 1 und Bild 3) mit Zuführtisch und einem Abstand h zwischen der Standposition und der Oberfläche des Zuführtischs zwischen 800 mm und 1 050 mm. Die Schneiddicke t muss ≤ 0,5 mm betragen.
Bild 1 - Offene Entschwartungs-, Enthäutungs- und Entvliesmaschine
Bild 2 - System einer offenen Entschwartungsmaschine
Bild 3 - System einer offenen Entvliesmaschine
c)   Automatische Maschinen (siehe Bild 4 und Bild 5), die von einem Bediener beschickt werden, mit einem Abstand zwischen der Standposition und der Oberfläche des Zuführungsbands zwischen 800 mm und 1 050 mm.
Automatische Maschinen, die automatisch beschickt werden und in Zerlegestraßen integriert sind, müssen die Anforderungen an die Höhe der Oberfläche des Zuführungsbands (800 mm bis 1 050 mm) nicht erfüllen, weil ergonomische Aspekte nicht berücksichtigt werden müssen.
Automatische Maschinen könnten mit verschiedenen Walzen ausgestattet werden (siehe Bild 6).
Bild 4 - Automatische Maschine
Bild 5 - System einer automatischen Maschine
Bild 6 - Beispiele für Walzen
d)   Kombinierte Maschinen sind für die Verwendung als automatische oder offene Maschinen ausgelegt.
Entschwartungs-, Enthäutungs- und Entvliesmaschinen bestehen hauptsächlich aus Maschinenständer, Zahnwalze mit Abstreiferkamm, Andrückrolle mit Abstreiferrechen, Transportwalze mit Abstreiferwalze, Schneideinrichtung und elektrischen, elektronischen oder pneumatischen Komponenten, abhängig von der Maschinenart.
Entschwartungs-, Enthäutungs- und Entvliesmaschinen können ausgerüstet sein z. B. mit
-   Zuführ- und/oder Abführtisch;
-   Zuführ- und/oder Abführtransportband;
-   Schneideinrichtung;
-   Walzen (siehe beispielsweise Bild 6);
-   Abstreiferkamm/Abstreiferwalze/Abstreiferrechen.

Machines pour les produits alimentaires - Machines à découenner, éplucher et peler - Prescriptions relatives à la sécurité et à l'hygiène

Le présent document traite de tous les phénomènes dangereux, situations dangereuses et événements dangereux spécifiques aux machines à découenner, éplucher et peler, lorsqu’elles sont utilisées normalement ou dans des conditions de mauvaise utilisation raisonnablement prévisible par le fabricant (voir Article 4).
Le présent document traite des phénomènes dangereux susceptibles de se produire lors de la mise en service, du fonctionnement, du nettoyage, de l’utilisation, de la maintenance et de la mise hors service de la machine.
Les machines décrites dans la présente norme sont utilisées pour découenner, éplucher et peler de la viande et du poisson à l'aide d'une lame droite et / ou de lames circulaires. L’alimentation peut être réalisée manuellement ou automatiquement.
Pour les machines à découenner, éplucher et peler ouvertes, le produit est guidé manuellement vers le dispositif de coupe.
Pour les machines à découenner, éplucher et peler automatiques, le produit est transporté par un tapis d’amenée vers le dispositif de coupe. Les produits d’un poids > 25 kg doivent être traités par une machine automatique.
Les machines à découenner, éplucher et peler à usage domestique, les machines guidées à main et les machines de table ne sont pas couvertes par la présente norme.
Le présent document ne s’applique qu’aux machines fabriquées après la date de publication.
La présente norme couvre les types de machines suivants :
a)   machine à découenner ouverte (voir Figure 1 et Figure 2) avec plateau d'amenée et une distance h entre la position debout et la surface du plateau d'amenée comprise entre 800 mm et 1 050 mm. L’épaisseur de coupe doit être t ≤ 5 mm ;
b)   machine à éplucher et peler ouvertes (voir Figure 1 et Figure 3) avec plateau d'amenée et une distance h entre la position debout et la surface du plateau d'amenée comprise entre 800 mm et 1 050 mm. L’épaisseur de coupe doit être t ≤ 0,5 mm.
Figure 1 - Machines à découenner, éplucher et peler ouvertes
Figure 2 - Système d'une machine à découenner ouverte
Figure 3 - Système d'une machine à peler ouverte
c)   les machines automatiques (voir Figure 4 et Figure 5), chargées par un opérateur, avec une distance entre la position debout et la surface du tapis d’amenée comprise entre 800 mm et 1 050 mm.
Les machines automatiques chargées automatiquement et intégrées dans des lignes de démontage ne sont pas soumises aux exigences relatives à la hauteur du tapis d’amenée (comprise entre 800 mm et 1 050 mm), dans la mesure où les questions d’ergonomie ne sont pas à prendre en compte.
Les machines automatiques peuvent être équipées de différents rouleaux (voir Figure 6).
Figure 4 - Machine automatique
Figure 5 - Système d'une machine automatique
Figure 6 - Exemples de rouleaux
d)   les machines combinées sont conçues pour être utilisées en tant que machines automatiques ou ouvertes.
Les machines à découenner, éplucher et peler comprennent principalement un châssis, un rouleau denté avec peigne racleur, un rouleau d'appui avec un râteau racleur, un rouleau de transport avec rouleau racleur, un dispositif à lame, ainsi que des composants électriques, électroniques et / ou pneumatiques en fonction de chaque type de machine.
Les machines à découenner, éplucher et peler peuvent par exemple être équipées des éléments suivants :
-   plateau d'amenée et / ou d'évacuation ;
-   tapis d'amenée et / ou d'évacuation ;
-   dispositif de coupe ;
-   rouleaux (par exemple voir Figure 6) ;
-   peigne racleur / rouleau racleur / râteau racleur.

Stroji za predelavo hrane - Stroji za odstranjevanje kože - Varnostne in higienske zahteve

General Information

• Status: Not Published
• Public Enquiry End Date: 26-Jan-2020
• ICS: 67.260 - Plants and equipment for the food industry
• Technical Committee: VSN - Safety of machinery
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Aug-2022
• Due Date: 08-Oct-2022
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: EN 12355:2022 - Food processing machinery - Derinding-, skinning- and membrane removal machines - Safety and hygiene requirements

RELATIONS

• Revised: SIST EN 12355:2003+A1:2010 - Food processing machinery - Derinding-, skinning- and membrane removal machines - Safety and hygiene requirements
• Effective Date: 30-Sep-2015
• Replaces: SIST EN 12355:2003+A1:2010 - Food processing machinery - Derinding-, skinning- and membrane removal machines - Safety and hygiene requirements
• Effective Date: 03-Aug-2022

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 12355:2020
01-januar-2020

Stroji za predelavo hrane - Stroji za odstranjevanje kože - Varnostne in higienske

zahteve

Food processing machinery - Derinding-, skinning- and membrane removal machines -

Safety and hygiene requirements
Nahrungsmittelmaschinen - Entschwartungs-, Enthäutungs- und Entvliesmaschinen -
Sicherheits- und Hygieneanforderungen

Machines pour les produits alimentaires - Machines à découenner, éplucher et peler -

Prescriptions relatives à la sécurité et à l'hygiène
Ta slovenski standard je istoveten z: prEN 12355
ICS:
67.260 Tovarne in oprema za Plants and equipment for the
živilsko industrijo food industry
oSIST prEN 12355:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12355:2020
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oSIST prEN 12355:2020
DRAFT
EUROPEAN STANDARD
prEN 12355
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2019
ICS 67.260 Will supersede EN 12355:2003+A1:2010
English Version
Food processing machinery - Derinding-, skinning- and
membrane removal machines - Safety and hygiene
requirements

Machines pour les produits alimentaires - Machines à Nahrungsmittelmaschinen - Entschwartungs-,

découenner, éplucher et peler - Prescriptions relatives Enthäutungs- und Entvliesmaschinen - Sicherheits-

à la sécurité et à l'hygiène und Hygieneanforderungen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 153.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12355:2019 E

worldwide for CEN national Members.
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oSIST prEN 12355:2020
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Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references ................................................................................................................................. 10

3 Terms and definitions ................................................................................................................................ 12

4 List of hazards ............................................................................................................................................... 13

5 Safety requirements and/or measures ................................................................................................ 15

5.1 General ............................................................................................................................................................. 15

5.2 Mechanical hazards ..................................................................................................................................... 16

5.2.1 General ............................................................................................................................................................. 16

5.2.2 Open derinding machine ........................................................................................................................... 16

5.2.3 Open skinning and membrane removal machine ............................................................................ 23

5.2.4 Automatic machines .................................................................................................................................... 24

5.2.5 Combining machine ..................................................................................................................................... 32

5.3 Electrical hazards ......................................................................................................................................... 32

5.3.1 General ............................................................................................................................................................. 32

5.3.2 Stopping function of switching devices ................................................................................................ 32

5.3.3 Emergency stop-device .............................................................................................................................. 32

5.3.4 Protection against water ingress ............................................................................................................ 32

5.3.5 ON- and OFF-switch ..................................................................................................................................... 34

5.3.6 Electromagnetic compatibility ................................................................................................................ 34

5.3.7 Wheel-mounted machines ........................................................................................................................ 34

5.4 Hazards from loss of stability .................................................................................................................. 34

5.5 Noise reduction ............................................................................................................................................. 35

5.6 Ergonomic requirements .......................................................................................................................... 35

5.7 Hygiene and cleaning .................................................................................................................................. 36

5.7.1 General ............................................................................................................................................................. 36

5.7.2 Food area ......................................................................................................................................................... 37

5.7.3 Splash area...................................................................................................................................................... 38

5.7.4 Non-food area ................................................................................................................................................ 38

5.7.5 Surface Conditions ....................................................................................................................................... 38

5.7.6 Cleaning ........................................................................................................................................................... 38

6 Verification of safety and hygiene requirements and/or measures ......................................... 39

7 Information for the user ............................................................................................................................ 40

7.1 General ............................................................................................................................................................. 40

7.2 Instruction handbook ................................................................................................................................. 40

7.3 Marking ............................................................................................................................................................ 43

Annex A (normative) Noise test code for derinding-, skinning- and membrane removal

machines (grade 2) ...................................................................................................................................... 44

A.1 Emission sound pressure level determination ................................................................................. 44

A.2 Sound power level determination ......................................................................................................... 44

A.3 Installation and mounting conditions .................................................................................................. 44

A.4 Operating conditions .................................................................................................................................. 44

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A.5 Measurement ................................................................................................................................................. 44

A.6 Information to be recorded ...................................................................................................................... 44

A.7 Information to be reported ....................................................................................................................... 45

A.8 Declaration and verification of the noise emission values ............................................................ 45

Annex B (normative) Design principles to ensure the cleanability of derinding-, skinning-

and membrane removal machines ......................................................................................................... 46

B.1 Materials of construction ........................................................................................................................... 46

B.1.1 Type of materials .......................................................................................................................................... 46

B.1.1.1 Materials for food area ............................................................................................................................... 46

B.1.1.2 Materials for splash area ........................................................................................................................... 46

B.1.1.3 Non food area ................................................................................................................................................. 46

B.2 Design ............................................................................................................................................................... 46

B.2.1 General ............................................................................................................................................................. 46

B.2.2 Food area ......................................................................................................................................................... 46

B.2.2.1 Surfaces ............................................................................................................................................................ 46

B.2.2.2 Inside corners ................................................................................................................................................ 46

B.2.2.3 Grooves ............................................................................................................................................................. 48

B.2.2.4 Permanent joints .......................................................................................................................................... 48

B.2.2.5 Surface roughness ........................................................................................................................................ 48

B.2.3 Splash area ...................................................................................................................................................... 48

B.2.3.1 Surface .............................................................................................................................................................. 48

B.2.3.2 Inside corners ................................................................................................................................................ 48

B.2.3.3 Grooves ............................................................................................................................................................. 48

B.2.3.4 Openings .......................................................................................................................................................... 49

B.2.3.5 Permanent joints .......................................................................................................................................... 49

B.2.3.6 Fastening methods ....................................................................................................................................... 49

B.2.4 Non-food area ................................................................................................................................................. 50

B.2.5 Floor-type machines .................................................................................................................................... 51

B.2.5.1 Wheel-mounted machines ......................................................................................................................... 51

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ...................................................... 52

Bibliography ................................................................................................................................................................. 54

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oSIST prEN 12355:2020
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European foreword

This document (prEN 12355:2019) has been prepared by Technical Committee CEN/TC 153

“Machinery intended for use with foodstuffs and feed”, the secretariat of which is held by DIN.

This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12355:2003+A1:2010.

This document has been prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive 2006/42/EC.

For relationship with EU Directive 2006/42/EC, see informative Annex ZA, which is an integral part of

this document.
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Introduction
This document is a type-C-standard as stated in EN ISO 12100:2010.

This document is of relevance, in particular, for the following stakeholder groups representing the

market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, market surveillance etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in the case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations or hazardous events

are covered are indicated in the Scope of this document.

When requirements of this type-C-standard are different from those which are stated in type-A- or

type-B-standards, the requirements of this type-C-standard take precedence over the requirements of

the other standards for machines that have been designed and built according to the requirements of

this type-C standard.
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1 Scope

This document deals with all significant hazards, hazardous situations and events relevant to derinding-

, skinning- and membrane removal machines, when they are used as intended and under conditions of

misuse which are reasonably foreseeable by the manufacturer (see Clause 4).

This document deals with the hazards which can arise during commissioning, operation, cleaning, use,

maintenance and decommissioning of the machine.

The machines described in this standard are used for derinding-, skinning- and membrane removal of

meat and fish by cutting at a straight blade and/or cutting with circular blades. Feeding could be done

manually or automatically.

Using open derinding-, skinning- and membrane removal machines, the product is guided by hand

towards the cutting device.

With automatic derinding-, skinning and membrane removal machines the product is transported by an

infeed conveyor against the cutting device. Product with a weight > 25 kg has to be processed by an

automatic machine.

Derinding-, skinning-, and membrane removal machines for domestic purposes, hand-guided machines

and table-top machines are not covered by this standard.

This document only applies to machines which are manufactured after the date of issue of this

document.
This document covers the following types of machines:

a) open derinding machines (see Figure 1 and Figure 2) with infeed table and a distance h between

the standing position and the surface of the infeed table from 800 mm to 1 050 mm. The cutting

thickness shall be t ≤ 5 mm;

b) open skinning- and membrane removal machines (see Figure 1 and Figure 3) with infeed table and

a distance h between the standing position and the surface of the infeed table from 800 mm to

1 050 mm. The cutting thickness shall be t ≤ 0,5 mm.
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oSIST prEN 12355:2020
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Key
1 tooth/transport roller 6 foot switch
2 cutting device 7 drive
3 outfeed table 8 sliding plate
4 infeed table h table height
5 ON-/OFF-switch
Figure 1 — Open derinding-, skinning- and membrane removal machine
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oSIST prEN 12355:2020
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Key
1 product 6 removed product (rind, skin, membrane)
2 infeed table 7 stripper comb
3 blade holder 8 transport roller
4 tooth roller 9 stripper roller
5 straight blade t cutting thickness
Figure 2 — System of an open derinding machine
Key
1 product 6 removed product (rind, skin, membrane)
2 infeed table 7 stripper comb
3 blade holder 8 transport roller
4 tooth roller 9 stripper roller
5 straight blade t cutting thickness
Figure 3 — System of an open membrane removal machine

c) Automatic machines (see Figure 4 and Figure 5), which are charged by an operator, with a distance

between the standing position and the surface of the infeed conveyor between 800 mm and

1 050 mm.

Automatic machines which are charged automatically and are integrated in dismantling lines do not

have to follow the requirements on the height of the surface of the infeed conveyor (800 mm to

1 050 mm) because the ergonomic matters need not be considered.
Automatic machines could be equipped with different rolls (see Figure 6).
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oSIST prEN 12355:2020
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Key
1 outfeed conveyor 5 tooth / transport roller
2 tunnel shaped guard 6 infeed conveyor
3 hold-down roller, blade roller, combined roller 7 drive
4 cutting device 8 sliding plate
Figure 4 — Automatic machine
Key
1 hold-down roller, blade roller, combined roller 5 stripper comb / roller
2 infeed conveyor 6 cutting device
3 product 7 outfeed conveyor

4 tooth / transport roller 8 hold-down roller, blade roller, combined roller (optional)

Figure 5 — System of an automatic machine
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a) hold-down rolls (divided)
b) hold-down rolls (undivided)
c) blade roller (divided) d) combined roller (divided)
Figure 6 — Examples of rolls
d) Combining machines are designed to be used as automatic or open machines.

Derinding-, skinning- and membrane removal machines consist mainly of a machine frame, tooth roller

with stripper comb, hold-down roller with stripper rake, transport roller with stripper roller, cutting

device and electrical, electronic, or pneumatic components, depending on the machine type.

Derinding-, skinning- and membrane removal machines can e.g. be equipped with a:
— infeed and / or outfeed table;
— infeed and / or outfeed conveyor;
— cutting device;
— rolls (e.g. see Figure 6);
— stripper comb/stripper roller/stripper rake.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
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EN 614-1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and

general principles

EN 1005-1:2001+A1:2008, Safety of machinery — Human physical performance — Part 1: Terms and

definitions

EN 1005-2:2003+A1:2008, Safety of machinery — Human physical performance — Part 2: Manual

handling of machinery and component parts of machinery

EN 1005-3:2002+A1:2008, Safety of machinery — Human physical performance — Part 3: Recommended

force limits for machinery operation

EN 1672-2:2005+A1:2009, Food processing machinery — Basic concepts — Part 2: Hygiene requirements

EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General

requirements (IEC 60204-1:2005, modified)

EN 60529:1991, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)

EN 61496-1:2013, Safety of machinery — Electro-sensitive protective equipment — Part 1: General

requirements and tests (IEC 61496-1:2012)

EN ISO 3744:2010, Acoustics — Determination of sound power levels of noise sources using sound

pressure — Engineering method for an essentially free field over a reflecting plane (ISO 3744:2010)

EN ISO 4287:1998, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms,

definitions and surface texture parameters (ISO 4287:1997)

EN ISO 4871:2009, Acoustics — Declaration and verification of noise emission values of machinery and

equipment – (ISO 4871:1996)

EN ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of

emission sound pressure levels at a work station and at other specified positions in an essentially free field

over a reflecting plane with negligible environmental corrections (ISO 11201:2010)

EN ISO 11688-1:2009, Acoustics — Recommended practice for the design of low-noise machinery and

equipment — Part 1: Planning (ISO/TR 11688-1:1995)

EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 13849-1:2015, Safety of machinery — Safety related parts of control systems — Part 1: General

principles for design (ISO 13849-1:2015)

EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by

upper and lower limbs (ISO 13857:2008)

EN ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for

design and selection (ISO 14119:2013)

EN ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and

construction of fixed and movable guards (ISO 14120:2015)
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3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
strip

mechanical process for stripping off skin or membrane from rotating machine parts

3.2
stripper comb
comb-shaped insert to strip off the debris from the tooth roller
3.3
stripper rake
rake-shaped device to strip skin or membrane off the hold-down rolls
3.4
stripper roller
shaft with teeth to strip skin or membrane off the transport roller
3.5
hold-down roller
device for pushing down the product

Note 1 to entry: The roller may consist of one undivided piece or be divided into several segments. Each roller

may be profiled on the perimeter and/or the width. The inner rolls may also have smaller diameters.

3.6
cutting device

device for cutting the rind, skin or membrane from the product, consisting of blade holder and straight

blade
3.7
blade holder
device to act as a holding tool for the straight blade
Note 1 to entry: The blade holder is not intended for circular blades.
3.8
blade roller

rotating cutting tool with circular blades for the slashing or cutting of products

Note 1 to entry: One or more circular blades are spread across the width. Each circular blade may be profiled on

the perimeter. The inner circular blades may also have smaller diameters. This roller is considered divided.

3.9
combined roller
blade roller with segments of hold-down rolls placed between the circular blades
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3.10
round product
product of nearly round shape
Note 1 to entry: E.g. pickled knuckle of pork, hind ham.
3.11
hold-to-run control device
switch which needs a continuous actuation for operation
3.12
cover guard
fixed or movable guard over the infeed, outfeed and rolls
3.13
transport roller
shaft with teeth without stripper grooves
3.14
tooth roller
shaft with teeth and stripper grooves
3.15
cutting thickness

distance between the rotating tooth / transport roller and the tip of the straight blade

3.16
easily cleanable

designed and constructed to be cleanable by a simple cleaning methode, if necessary after removing

parts that can be easily dismantled
4 List of hazards

This clause contains all the significant hazards, hazardous situations and events, identified by a risk

assessment significant for this type of machinery and which require measures to eliminate or reduce

the risk associated with the identified hazards (see Table 1).

Figure 7, Figure 8 and Figure 9 are showing the significant danger zones of the different machine types.

Table 1 — List of significant hazards
Clause/subclause

Location or cause Hazards, hazardous situations and hazardous events in this European

Standard
General Hazards 5.1
Failure/disorder of the control system and control
General 5.2.1
circuits
Open derinding
Cutting; drawing in 5.2.2
machine
Open skinning and
membrane removal Cutting; drawing in 5.2.3
machine
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Clause/subclause

Location or cause Hazards, hazardous situations and hazardous events in this European

Standard
Automatic machine Cutting; drawing in 5.2.4
Combining machine Cutting; drawing in 5.2.5
Electric shock from direct or indirect contact with live
5.3
Electricity supply components; external influences on electrical equipment
7.2
(e.g. cleaning with water)
Design of machinery Hazards generated by loss of stability 5.4
Hazards generated by noise which may result in hearing,
5.5
damage, tinnitus, stress and accidents due to interference
Design of machinery 7.2
with speech communication and interference with the
Annex A
perception of acoustic signals
Hazards generated by neglecting ergonomic principles,
Design of machinery e.g. unhealthy body posture or excessive physical effort,
to facilitate its inadequate consideration of human hand/arm
...