Patent US4974787A successfully refreshed from Google Patents.
US4974787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film guide device
Assignee: Pentax Corp
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Filing: 1989-12-15
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Granted: 1990-12-04
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Expires: 2009-12-15
Abstract
Abstract Disclosed is a film guide device of a camera for introducing the end of a film fed by a sprocket between a take-up spool and a guide member which is in resilient contact with the take-up spool. The guide member is composed of a roller located in the area corresponding to the cutaway portion at the end of a film, and a guide portion located in the area corresponding to the tongue portion of the film and opposed to the take-up spool. The positions of the roller and guide portion are set so that, when the roller is in contact with the take-up spool, the guide portion is apart from the take-up spool by a distance greater than the thickness of the film.
Inventors
- 👤 Akihiro Arai
- 👤 Masao Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:18
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B1/00; G03B1/56
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
244 words
A film guide device of a camera for guiding film having a leading tongue portion and a remaining portion and adapted to be fed to be wound up on a take-up spool having a circumferential surface, said film guide device comprising a guide member arranged to be in resilient contact with said take-up spool, said guide member comprising: a guide plate portion oppositely positioned with respect to a first circumferential surface area of said take-up spool, the leading tongue portion of the film passing said first area when it is wound up; and a guide roller portion oppositely positioned with respect to a second circumferential surface area of said take-up spool, wherein said film remaining portion passes both said first and second areas when it is would up on said take-up spool; said guide plate portion being spaced apart from said circumferential surface of said take-up spool by a distance greater than the thickness of said film when said guide roller portion contacts said circumferential surface; said guide roller portion being arranged to contact the film after the leading tongue portion is nipped between said circumferential surface of said take-up spool and at least part of said remaining portion of the film, such that by the time that said remaining portion of the film is nipped between said guide roller portion and said circumferential surface of said take-up spool, the leading tongue portion of the film will be tightly wound on said take-up spool.
Claim 2
Dependent Claim
244 words
A film guide device of a camera for guiding film having a leading tongue portion and a remaining portion and adapted to be fed to be wound up on a take-up spool having a circumferential surface, said film guide device comprising a guide member arranged to be in resilient contact with said take-up spool, said guide member comprising: a guide plate portion oppositely positioned with respect to a first circumferential surface area of said take-up spool, the leading tongue portion of the film passing said first area when it is wound up; and a guide roller portion oppositely positioned with respect to a second circumferential surface area of said take-up spool, wherein said film remaining portion passes both said first and second areas when it is would up on said take-up spool; said guide plate portion being spaced apart from said circumferential surface of said take-up spool by a distance greater than the thickness of said film when said guide roller portion contacts said circumferential surface; said guide roller portion being arranged to contact the film after the leading tongue portion is nipped between said circumferential surface of said take-up spool and at least part of said remaining portion of the film, such that by the time that said remaining portion of the film is nipped between said guide roller portion and said circumferential surface of said take-up spool, the leading tongue portion of the film will be tightly wound on said take-up spool.
Claim 3
Dependent Claim
26 words
A film guide device according to claim 1, further including means for biasing said guide plate portion and said guide roller portion towards said take-up spool.
Claim 4
Dependent Claim
31 words
A film guide device according to claim 1, further comprising means for positioning said guide plate portion and said guide roller portion opposite substantially axially aligned areas of said take-up spool.
Claim 5
Dependent Claim
53 words
A film guide device for a camera according to claim 1, wherein the positions of said roller and guide portion are set so that, when said roller is in contact with said take-up spool, said guide portion is apart from said take-up spool by a distance greater than the thickness of said film.
Claim 6
Dependent Claim
145 words
In a film guide device of a camera for introducing the end of a film fed by a sprocket between a take-up spool and a guide member which is adapted to be positioned in resilient contact with said take-up spool, said film comprising a leader tongue portion defined by a cut away film portion and a remaining film portion, said take-up spool including a circumferentially extending film supporting surface, said guide member comprising: a roller positioned opposite an area of said take-up spool corresponding to the cut-away film portion and adapted to contact said remaining film portion on said film supporting surface of said take-up spool; and a guide portion positioned opposite an area of said take-up spool corresponding to the leader tongue portion of the film, spaced from the cut-away film portion and spaced from the circumferential film supporting surface of the take-up spool.
Claim 7
Dependent Claim
145 words
In a film guide device of a camera for introducing the end of a film fed by a sprocket between a take-up spool and a guide member which is adapted to be positioned in resilient contact with said take-up spool, said film comprising a leader tongue portion defined by a cut away film portion and a remaining film portion, said take-up spool including a circumferentially extending film supporting surface, said guide member comprising: a roller positioned opposite an area of said take-up spool corresponding to the cut-away film portion and adapted to contact said remaining film portion on said film supporting surface of said take-up spool; and a guide portion positioned opposite an area of said take-up spool corresponding to the leader tongue portion of the film, spaced from the cut-away film portion and spaced from the circumferential film supporting surface of the take-up spool.
Claim 8
Dependent Claim
58 words
A film guide device for a camera according to claim 5, further comprising means for positioning said roller and guide portion so that when said roller is in contact with said film supporting surface of the take-up spool, said guide portion is spaced apart from said take-up spool by a distance greater than the thickness of the film.
Claim 9
Dependent Claim
31 words
A film guide device for a camera according to claim 6, further including means for biasing said roller and said guide portion towards said film supporting surface of said take-up spool.
Claim 10
Dependent Claim
56 words
A film guide device of a camera according to claim 5, further comprising means for spacing said guide portion from said circumferential film supporting surface of said take-up spool by a distance greater than the thickness of the film when said roller is in direct contact with said circumferential film supporting surface of said take-up spool.
Claim 11
Dependent Claim
46 words
A film guide device according to claim 5, further comprising means for positioning said roller to contact the remaining film portion after the leading tongue portion of the film is nipped between said circumferential film supporting surface of said take-up spool and the remaining film portion.
Claim 12
Dependent Claim
30 words
A film guide device of a camera according to claim 5, further including means for supporting said roller and said guide portion, said supporting means comprising a single support structure.
Claim 13
Dependent Claim
28 words
A film guide device according to claim 5, further comprising means for positioning said roller and said guide portion opposite substantially axially aligned areas of said take-up spool.
Claim 14
Dependent Claim
186 words
In a film guide device of a camera for introducing the end of a film fed by a sprocket between a take-up spool and a guide member which is adapted to be in resilient contact with said take-up spool, the end of the film comprising a tongue portion defined by a cutaway film portion and a remaining film portion, said take-up spool including a circumferentially extending film supporting surface, said guide member comprising: first guide means for guiding the film tongue portion and spaced from the film supporting surface of said take-up spool; second guide means for guiding the film and located adjacent the cutaway film portion, said second guide means adapted to contact said film supporting surface of said take-up spool; said second guide means comprising a guide roller adapted to contact said remaining film portion after the leading tongue portion is nipped between said circumferential film supporting surface of said take-up spool and the remaining film portion; and wherein said first guide means is spaced from said film supporting surface of said take-up spool by a distance greater than the thickness of the film.
Claim 15
Dependent Claim
186 words
In a film guide device of a camera for introducing the end of a film fed by a sprocket between a take-up spool and a guide member which is adapted to be in resilient contact with said take-up spool, the end of the film comprising a tongue portion defined by a cutaway film portion and a remaining film portion, said take-up spool including a circumferentially extending film supporting surface, said guide member comprising: first guide means for guiding the film tongue portion and spaced from the film supporting surface of said take-up spool; second guide means for guiding the film and located adjacent the cutaway film portion, said second guide means adapted to contact said film supporting surface of said take-up spool; said second guide means comprising a guide roller adapted to contact said remaining film portion after the leading tongue portion is nipped between said circumferential film supporting surface of said take-up spool and the remaining film portion; and wherein said first guide means is spaced from said film supporting surface of said take-up spool by a distance greater than the thickness of the film.
Claim 16
Dependent Claim
28 words
The film guide device according to claim 12, further comprising means for biasing said first and second guide means towards said film supporting surface of said take-up spool.
Claim 17
Dependent Claim
31 words
The film guide device of a camera according to claim 12, further comprising means for supporting both said first and second guide means, said supporting means comprising a single supporting structure.
Claim 18
Dependent Claim
31 words
The film guide device of a camera according to claim 12, further comprising means for positioning said first and second guide means opposite substantially axially aligned areas of said take-up spool.
References Cited (Backward Citations)
US3567147A
Cited
US3979079A
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US4274726A
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US4310233A
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US4451011A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |