US3614013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spool for winding films
Assignee: Minolta Co Ltd
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Filing: 1969-07-24
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Granted: 1971-10-19
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Expires: 1989-07-24
Abstract
Abstract A spool for winding films, having a holding means disposed at a position engageable with perforations of a film, which holding means is both engageable with and disengageable from the perforations when the film moves lateral to the longitudinal centerline thereof, but only engageable with the film when the film moves longitudinally.
Inventors
- 👤 Yoshio Kuramoto
- 👤 Toshio Kobori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:56
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B1/00; G03B2217/00; G03B2217/26; G03B2217/261
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
A film-winding spool comprising a longitudinal hub including a first cylindrical section and a coaxial second section of lesser diameter than said first section, a plurality of circumferentially spaced longitudinal tongues surrounding and radially spaced from said second section and having free ends longitudinally spaced from said first section, the confronting edges of successive tongues delineating a plurality of circumferentially spaced slits parallel to the hub axis and affording transverse access to the space between said tongues and said first section and the space between the free ends of said tongues and said hub affording longitudinal access to said space between said tongues and second section, the outer faces of said tongues substantially lying in the cylindrical plane of the peripheral face of said first section, and a plurality of circumferentially spaced film sprocket aperture engaging elements extending transversely in the space betwEen said tongues and second section and having free ends and longitudinally spaced upper and lower faces converging toward said free ends.
Claim 2
Dependent Claim
164 words
A film-winding spool comprising a longitudinal hub including a first cylindrical section and a coaxial second section of lesser diameter than said first section, a plurality of circumferentially spaced longitudinal tongues surrounding and radially spaced from said second section and having free ends longitudinally spaced from said first section, the confronting edges of successive tongues delineating a plurality of circumferentially spaced slits parallel to the hub axis and affording transverse access to the space between said tongues and said first section and the space between the free ends of said tongues and said hub affording longitudinal access to said space between said tongues and second section, the outer faces of said tongues substantially lying in the cylindrical plane of the peripheral face of said first section, and a plurality of circumferentially spaced film sprocket aperture engaging elements extending transversely in the space betwEen said tongues and second section and having free ends and longitudinally spaced upper and lower faces converging toward said free ends.
Claim 3
Dependent Claim
36 words
The spool of claim 1 wherein said engaging elements extend outwardly from said hub second section toward said tongues and said upper and lower faces of said elements are outwardly downwardly and outwardly upwardly inclined respectively.
Claim 4
Dependent Claim
30 words
The spool of claim 2 wherein said elements are positioned on said hub second section and said tongues have recesses formed in the inner faces thereof confronting respective engaging elements.
Claim 5
Dependent Claim
36 words
The spool of claim 2 wherein each of said engaging tongues has a recess formed in its inner face and each of said engaging elements is resiliently mounted and separably urged into engagement with respective recesses.
Claim 6
Dependent Claim
28 words
The spool of claim 1 wherein the free end edges of each of said tongues converge toward the respective free ends to delineate converging passageways to said slits.
Claim 7
Dependent Claim
22 words
The spool of claim 1 wherein the free end edges of said tongues are bevelled to provide inwardly downwardly inclined top surfaces.
Claim 8
Dependent Claim
157 words
A spool for winding up films, comprising a cylindrical member provided with a small-diameter portion and a large-diameter portion, a film-holding member composed of plural tongues which encloses said small-diameter portion of the cylindrical member so as to leave settled slits therebetween, said slits extending respectively in parallel with the longitudinal axis of the cylindrical member, said tongues providing an interrupted outer cylindrical surface of which diameter is equal to that of said large-diameter portion of the cylindrical member, and projections extending respectively from the cylindrical member towards said tongues in each of said slits, each of said projections having upper and lower side faces inclined along the longitudinal direction of the cylindrical member and diverging gradually towards said cylindrical member, any of said projections being engageable with one of perforations of the film to be wound up so that the projection prevents relative movement between the spool and film in the longitudinal direction of the film.
Claim 9
Dependent Claim
157 words
A spool for winding up films, comprising a cylindrical member provided with a small-diameter portion and a large-diameter portion, a film-holding member composed of plural tongues which encloses said small-diameter portion of the cylindrical member so as to leave settled slits therebetween, said slits extending respectively in parallel with the longitudinal axis of the cylindrical member, said tongues providing an interrupted outer cylindrical surface of which diameter is equal to that of said large-diameter portion of the cylindrical member, and projections extending respectively from the cylindrical member towards said tongues in each of said slits, each of said projections having upper and lower side faces inclined along the longitudinal direction of the cylindrical member and diverging gradually towards said cylindrical member, any of said projections being engageable with one of perforations of the film to be wound up so that the projection prevents relative movement between the spool and film in the longitudinal direction of the film.
Claim 10
Dependent Claim
40 words
A spool according to claim 7 wherein each of said projections being secured to the cylindrical member, and a recess is formed to the inner side of each of tongues so as to oppose to each one of the projections.
Claim 11
Dependent Claim
60 words
A spool according to claim 7 wherein each projection is formed on an elastic member which has one end secured to the cylindrical member, and a recess is formed to such portion of each one of the tongues that each one of the projections is opposed respectively, top of each of said projections entering into each of said recesses respectively.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |