US3973740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film reel spacer
Assignee: Microfilm Enterprises Corp
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Filing: 1975-10-07
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Granted: 1976-08-10
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Expires: 1995-10-07
Abstract
Abstract A spacer for use on microfilm reels to facilitate the storage of relatively small lengths of film thereon. The spacer comprises a unitary structure of resilient material having adjacent separable arcuate end portions which are deflected when the spacer is pressed onto the hub of the film reel, the resilience of the spacer material causing the arcuate end portions to come together when the spacer is on the reel hub. A plurality of spacing bars extend from the circular outer configuration of the spacer to define an inner circle having a diameter substantially equal to the outer diameter of the reel hub. The film to be stored may be threaded onto the reel hub between the arcuate end portions of the spacer.
Inventors
- 👤 Martin M. Schankler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:06
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
213 words
An annular spacing member for use in conjunction with a reel comprising a cylindrical hub having a circular cross-section with a given outer diameter and a pair of spaced parallel circular side flanges affixed to said hub, said spacing member having a circular outer configuration with an outer diameter greater than the outer diameter of said hub and less than the diameter of either of said flanges, the width of said member being slightly less than the space between said flanges, said member having at least three inwardly extending spacing means, the innermost extremities of said spacing means defining a circle having a diameter substantially equal to the outer diameter of said hub, said member comprising a unitary structure of resilient material having adjacent separable arcuate end portions, said end portions being deflectable and separable a distance at least equal to the outer diameter of said hub, so that said member can be installed on said hub by separating said end portions and sliding the thus opened member onto said hub, said end portions of said member being urged into adjacent relationship by the resilience of said member, said member when disposed about said hub serving to effectively increase the outer diameter thereof for any flexible strip material which may be wound thereon.
Claim 2
Dependent Claim
213 words
An annular spacing member for use in conjunction with a reel comprising a cylindrical hub having a circular cross-section with a given outer diameter and a pair of spaced parallel circular side flanges affixed to said hub, said spacing member having a circular outer configuration with an outer diameter greater than the outer diameter of said hub and less than the diameter of either of said flanges, the width of said member being slightly less than the space between said flanges, said member having at least three inwardly extending spacing means, the innermost extremities of said spacing means defining a circle having a diameter substantially equal to the outer diameter of said hub, said member comprising a unitary structure of resilient material having adjacent separable arcuate end portions, said end portions being deflectable and separable a distance at least equal to the outer diameter of said hub, so that said member can be installed on said hub by separating said end portions and sliding the thus opened member onto said hub, said end portions of said member being urged into adjacent relationship by the resilience of said member, said member when disposed about said hub serving to effectively increase the outer diameter thereof for any flexible strip material which may be wound thereon.
Claim 3
Dependent Claim
23 words
The combination according to claim 1, wherein said member comprises a plastic selected from the group consisting of acrylonitrile-butadiene-styrene, nylon, and acetal resin.
Claim 4
Dependent Claim
28 words
The combination according to claim 1, wherein the material comprising said member has a tensile elastic modulus in the range of 100,000 to 1,000,000 pounds per square inch.
Claim 5
Dependent Claim
18 words
The combination according to claim 1, wherein each of said spacing means comprises a radially oriented spacing protuberance.
Claim 6
Dependent Claim
44 words
The combination according to claim 1, wherein said member has a meandering cross-section, the outer portions thereof defining the outer diameter of said member and the inner portions thereof defining said circle having a diameter substantially equal to the outer diameter of said hub.
Claim 7
Dependent Claim
17 words
The combination according to claim 1, wherein said member comprises a wire formed into a spiral configuration.
Claim 8
Dependent Claim
27 words
The combination according to claim 1, wherein said member has a plurality of transverse apertures therein, with a slit extending from each aperture inwarly to said circle.
Claim 9
Dependent Claim
98 words
An annular spacing member for use in conjunction with a reel upon which a flexible strip material may be wound, said reel having a circular hub and a pair of spaced side flanges affixed thereto, said member having a circular outer configuration defining a mandrel surface upon which said strip material may be wound, said member having inwardly extending spacing means defining a circle corresponding to the periphery of said hub, said member comprising a unitary structure of resilient material having adjacent separable arcuate end portions which may be spread apart to install said member on said hub.
Claim 10
Dependent Claim
98 words
An annular spacing member for use in conjunction with a reel upon which a flexible strip material may be wound, said reel having a circular hub and a pair of spaced side flanges affixed thereto, said member having a circular outer configuration defining a mandrel surface upon which said strip material may be wound, said member having inwardly extending spacing means defining a circle corresponding to the periphery of said hub, said member comprising a unitary structure of resilient material having adjacent separable arcuate end portions which may be spread apart to install said member on said hub.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |