ISO 7761:2004

Micrographics - Single-core cartridge for 16 mm processed microfilm - Dimensions and operational constraints

ISO 7761:2004 specifies the dimensions of, and gives guidance on, the physical and performance characteristics of cartridges used for storing and viewing active-use 16 mm microfilm. It includes physical and optical compatibility requirements as well as test procedures. ISO 7761:2004 does not apply to cartridges used for storing microfilm for archival purposes.

Micrographie — Cartouche à noyau unique pour microfilm de 16 mm traité — Dimensions et contraintes opérationnelles

General Information

• Status: Published
• Publication Date: 11-Oct-2004
• ICS: 37.080 - Document imaging applications
• Technical Committee: ISO/TC 171 - Document management applications
• Drafting Committee: ISO/TC 171 - Document management applications
• Current Stage: 9093 - International Standard confirmed
• Start Date: 12-Feb-2021
• Completion Date: 13-Dec-2025

Overview

ISO 7761:2004 - Micrographics - Single-core cartridge for 16 mm processed microfilm - Dimensions and operational constraints - defines the physical and performance requirements for cartridges used to store and view active-use 16 mm microfilm. The standard sets precise cartridge and reel dimensions, operational constraints, compatibility requirements and test procedures to ensure reliable interfacing with readers and reader-printers. Note: ISO 7761:2004 explicitly does not apply to cartridges intended for archival long‑term storage.

Key topics and technical requirements

• Dimensional specifications: Detailed dimensions and tolerances are given for both open and enclosed single‑core cartridge assemblies (outer enclosure + reel). The standard provides figures and tables that define critical clearances to prevent rubbing and ensure cross‑vendor compatibility.
• Manufacturing tolerances: Moulding tolerances, fillet and corner radii, general wall thickness (nominal 2.0 mm) and acceptable draft angles are specified to guide production and tooling.
• Materials and finish: Requirements address material selection, surface finish, label recesses and prohibition of contaminants (oil, wax). Materials must be compatible with film to avoid image loss.
• Mechanical tests:
  • Maximum‑speed handling: unthread a 3 m film strip, run back and forth 25 cycles at the reader’s maximum speed - no image deterioration allowed.
  • Impact strength: cartridge with 30.5 m of 0.130 mm film dropped from 1.2 m onto a flat steel surface four times (corner, edge, both faces) without rupture or loss of function.
  • Test environment: conditioning at (50 ± 5)% RH and 23 °C ± 2 °C for 24 h prior to testing.
• Film/reel requirements: Reel dimensions, leader/trailer specifications, leader-film and core-film secureness criteria, winding and image placement rules to ensure automatic threading and correct image alignment.
• Operational constraints: Lubrication should not be required; markings must be flush or recessed; recommended reel widths to avoid cartridge wall contact.

Applications and who uses this standard

ISO 7761:2004 is intended for:

• Manufacturers of single‑core cartridges and 16 mm microfilm reels
• Designers and integrators of microfilm readers, reader‑printers and automatic threading systems
• Quality control and testing laboratories verifying cartridge performance and compatibility
• Document management vendors and micrographics service providers ensuring cross‑vendor interoperability

Practical benefits include improved mechanical interchangeability, reduced film damage during use, predictable behaviour in automatic threading equipment, and clear manufacturing guidance for consistent product quality.

Related standards

Normative and associated references cited in ISO 7761 include:

• ISO 6148 (micrographic film spools and cores)
• ISO 6196 series (micrographics vocabulary)
• ISO 6199 (operating procedures for 16 mm microfilming)

Keywords: ISO 7761:2004, 16 mm microfilm, single‑core cartridge, micrographics, cartridge dimensions, operational constraints, compatibility requirements, test procedures.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 7761
First edition
2004-10-15
Micrographics — Single-core cartridge
for 16 mm processed microfilm —
Dimensions and operational constraints
Micrographie — Cartouche à noyau unique pour microfilm de 16 mm
traité — Dimensions et contraintes opérationnelles

Reference number
©
ISO 2004
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©  ISO 2004
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ii © ISO 2004 – All rights reserved

Contents
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Requirements for cartridge assembly . 2
4.1 Dimensions. 2
4.1.1 Open cartridge. 2
4.1.2 Enclosed cartridge. 2
4.2 Test at maximum speed . 5
4.3 Materials. 7
4.3.1 Impact strength . 7
4.3.2 Test conditions. 7
4.3.3 Compatibility . 7
4.4 Lubrication. 7
4.5 Markings . 7
4.6 Position of labels . 7
4.7 Surface finish . 7
5 Requirements for reel and film . 9
5.1 Reel dimensions. 9
5.2 Leader. 9
5.2.1 Width . 9
5.2.2 Thickness. 9
5.2.3 Length . 9
5.2.4 Terminators . 9
5.3 Separate leaders . 11
5.3.1 Dimensions. 11
5.3.2 Leader-film secureness criterion . 11
5.4 Trailer . 11
5.4.1 Length . 11
5.4.2 Affixing film to the core. 11
5.4.3 Core-film secureness criteria . 11
5.4.4 Test conditions. 11
5.5 Image placement. 15
5.6 Materials. 16
5.6.1 Flexibility of flanges. 16
5.6.2 Impact strength . 16
5.6.3 Compatibility . 16
5.7 Maximum roll diameter. 16
5.8 Markings . 16
5.9 Surface finishing . 16
Annex A (normative) Reel capacity . 17
Annex B (informative) Materials. 18
Annex C (informative) Leading end of film . 19
Bibliography . 20

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7761 was prepared by Technical Committee ISO/TC 171, Document management applications,
Subcommittee SC 2, Application issues.
iv © ISO 2004 – All rights reserved

Introduction
With the acceptance of this International Standard, future readers and reader-printers will be designed to
accept cartridges used for storing and viewing processed 16 mm microfilm over a full range of specified
tolerances.
Figure 4 provides the dimensions for a reel that provides additional clearance between the flanges of the reel
and the inner walls of the enclosed cartridge described in Figure 2. Reels made to the specification in Figure 4
are suitable for all applications. Reels made to the upper limit of dimension B (see Figure 3) may rub the
inside wall of the enclosed cartridge. Figure 2 includes dimensions 2S and 2T. The addition of the 2S
dimension reduces the clearance of the flanges of the reel with the sides of the enclosed cartridge. The 2S
and 2T dimensions are only necessary when an M-style cartridge reel (metal insert drive) is housed in the
ISO 7761 standard enclosed case. These dimensions are necessary to control the wide leader in the M-style
cartridge.
This International Standard also specifies the winding of the processed microfilm on the reel and the physical
characteristics of the leading end of the film to ensure proper interfacing of the cartridges with automatic
threading readers and reader-printers of different makes.
INTERNATIONAL STANDARD ISO 7761:2004(E)

Micrographics — Single-core cartridge for 16 mm processed
microfilm — Dimensions and operational constraints
1 Scope
This International Standard specifies the dimensions of, and gives guidance on, the physical and performance
characteristics of cartridges used for storing and viewing active-use 16 mm microfilm.
It includes physical and optical compatibility requirements as well as test procedures.
This International Standard does not apply to cartridges used for storing microfilm for archival purposes.
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.
ISO 6148:2001, Photography — Micrographic films, spools, and cores — Dimensions
ISO 6196-1:1993, Micrographics — Vocabulary — Part 1: General terms
ISO 6196-2:1993, Micrographics — Vocabulary — Part 2: Image positions and methods of recording
ISO 6196-3:1997, Micrographics — Vocabulary — Part 3: Film processing
ISO 6196-4:1998, Micrographics — Vocabulary — Part 4: Materials and packaging
ISO 6196-5:1987, Micrographics — Vocabulary — Part 5: Quality of images, legibility, inspection
ISO 6196-6:1992, Micrographics — Vocabulary — Part 6: Equipment
ISO 6196-7:1992, Micrographics — Vocabulary — Part 7: Computer micrographics
ISO 6196-8:1998, Micrographics — Vocabulary — Part 8: Use
ISO 6199:1991, Micrographics — Microfilming of documents on 16 mm and 35 mm silver-gelatin type
microfilm — Operating procedures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6196 apply.
4 Requirements for cartridge assembly
4.1 Dimensions
The following requirements pertain to the cartridge assembly, which is composed of the outer enclosure
section (see Figures 1 and 2) and a reel (see Figures 3 and 4) assembled thereto and which is to be referred
to as “the cartridge”.
The cartridges shall be in conformity with the dimensions given in either Figure 1 or Figure 2.
4.1.1 Open cartridge
The following requirements pertain to the cartridge in Figure 1, assembled with a reel (see Figures 3 and 4).
The cartridge clip (outer piece) shall conform to the dimensions given in Figure 1 and Table 1.
4.1.1.1 Dimensional tolerances
For fillet radii: 0,40 mm minimum, 1,60 mm maximum.
For outside corner radii: 0,40 mm minimum, 0,80 mm maximum.
4.1.1.2 Moulding tolerances
For general dimensions up to 25,4 mm ± 0,10 mm.
For each additional 25,4 mm ± 0,03 mm.
For parting-line dimensions up to 25,4 mm ± 0,10 mm.
For each additional 25,4 mm ± 0,03 mm.
4.1.1.3 Wall thickness
General wall
...