US4285759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stripping a cover sheet
Assignee: EIDP Inc
•
Filing: 1979-11-19
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Granted: 1981-08-25
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Expires: 1999-11-19
Abstract
Abstract An apparatus for stripping an adherent cover sheet from a photosensitive film sandwich. A leader from a roll extends over a film having a cover sheet and is attached to an edge of the cover sheet. When the roll is driven, the leader wraps on it and strips the cover sheet from the film which had previously been fixed in a stationary position.
Inventors
- 👤 Richard B. Allen
- 👤 Thomas E. Patten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:23
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/0004; B29C63/0013; G; G03; G03F; G03F3/00; G03F3/10; G03F3/102; G03F7/00; G03F7/26; G03F7/28; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/919; Y10S156/926; Y10S271/00; Y10S271/90; Y10T; Y10T156/00; Y10T156/11; Y10T156/1126; Y10T156/1168; Y10T156/19; Y10T156/1961; Y10T156/1967; Y10T156/1972
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
An apparatus comprising: a support having a top surface on which a film including a cover sheet can be fixed in a stationary relationship with respect to a stripping roll; an elongated stripping roll mounted for rotation about an axis parallel to said top surface; a leader in the form of a thin sheet having opposed ends, one of said ends being attached to said roll, the other of said ends being adapted for attachment to an edge of a cover sheet remote from said roll; and drive means coupled to the roll for rotating said roll to apply an even, steady tension to said leader as said leader is wrapped thereon thereby stripping the cover sheet from a fixed film.
Claim 2
Independent Claim
121 words
An apparatus comprising: a support having a top surface on which a film including a cover sheet can be fixed in a stationary relationship with respect to a stripping roll; an elongated stripping roll mounted for rotation about an axis parallel to said top surface; a leader in the form of a thin sheet having opposed ends, one of said ends being attached to said roll, the other of said ends being adapted for attachment to an edge of a cover sheet remote from said roll; and drive means coupled to the roll for rotating said roll to apply an even, steady tension to said leader as said leader is wrapped thereon thereby stripping the cover sheet from a fixed film.
Claim 3
Dependent Claim
48 words
The apparatus of claim 1 wherein said drive means comprises a second roll mounted in parallelism with said stripping roll, one of said rolls being mounted for movement toward and away from a position in which the rolls are engaged, and a motor coupled to said second roll.
Claim 4
Dependent Claim
47 words
The apparatus of claim 1 wherein said drive means comprises a second roll mounted in parallelism with said stripping roll, the latter being mounted for swinging movement toward and away from a position of engagement with the second roll, and a motor coupled to said second roll.
Claim 5
Dependent Claim
21 words
The apparatus of claim 3 wherein said stripping roll is in the form of a hollow shell of thin, lightweight tubing.
Claim 6
Dependent Claim
47 words
The apparatus of claim 3 wherein is provided a lever for swinging the stripping roll, a cam associated with the lever and a switch coupled to said motor, said switch being positioned in the path of said cam to activate the motor before the rolls are engaged.
Claim 7
Dependent Claim
33 words
The apparatus of claim 5 wherein is provided a lost motion device coupling the lever to the stripping roll, thereby permitting limited movement of the lever and cam before the roll is swung.
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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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |