US3806574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat photographic sheets produced by forward and reverse rewinding of photographic material
Assignee: Individual
•
Filing: 1972-05-03
•
Granted: 1974-04-23
•
Expires: 1992-05-03
Abstract
Abstract A process for producing flat sheets, particularly photographic sheets for use in automatic film changing equipment, from a stored roll of material. The process is characterized by rewinding the inner convolutions of the stored roll, which have the highest degree of curl, in a manner that they again become the inner convolutions of roll material, i.e., by rewinding with the direction of roll-set curl and then reverse rewinding against the direction of roll-set curl.
Inventors
- 👤 H Arvidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/81; B; B29; B29C; B29C53/00; B29C53/32; B65; B65H; B65H23/00; B65H23/04; B65H23/34; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/43; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/4148
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
20 words
The process of claim 1 wherein said material has coated layers on both sides which contribute to the roll-set curl.
Claim 2
Dependent Claim
63 words
A process for producing flat smaller discrete sheets from a stored roll of material comprising the steps of: a. rewinding said material in the direction of roll-set curl; b. reverse rewinding said material against the direction of roll-set curl; c. holding the reverse rewound material for a time sufficient to cancel the roll-set curl; and d. converting said material into smaller discrete sheets.
Claim 3
Dependent Claim
20 words
The process of claim 3 wherein said material has coated layers on both sides which contribute to the roll-set curl.
Claim 4
Dependent Claim
26 words
The process of claim 3 wherein said material is photographic material and the step of holding the reverse rewound material extends to up to 72 hours.
Claim 5
Dependent Claim
20 words
The process of claim 4 wherein said photographic material comprises coated layers on both sides of a polyester film support.
Claim 6
Dependent Claim
29 words
The process of claim 3 wherein said material is medical and industrial x-ray film and the step of holding the reverse rewound material extends for up to 72 hours.
Claim 7
Dependent Claim
37 words
The process of claim 3 wherein the step of converting said material into smaller discrete sheets is accomplished by first slitting rolls of the material into narrower rolls and then chopping the material into smaller discrete sheets.
Claim 8
Dependent Claim
54 words
A process for removing the roll-set curl from a stored roll of material comprising the steps of a. reverse rewinding said material against the direction of roll-set curl; b. rewinding said material in the direction of roll-set curl; and c. holding the reverse rewound material for a time sufficient to cancel the roll-set curl.
Claim 9
Dependent Claim
20 words
The process of claim 9 wherein said material has coated layers on both sides which contribute to the roll-set curl.
Claim 10
Dependent Claim
63 words
A process for producing flat smaller discrete sheets from a stored roll of material comprising the steps of: a. reverse rewinding said material against the direction of roll-set curl; b. rewinding said material in the direction of roll-set curl; c. holding the reverse rewound material for a time sufficient to cancel the roll-set curl; and d. converting said material into smaller discrete sheets.
Claim 11
Dependent Claim
20 words
The process of claim 11 wherein said material has coated layers on both sides which contribute to the roll-set curl.
Claim 12
Dependent Claim
26 words
The process of claim 11 wherein said material is photographic material and the step of holding the reverse rewound material extends to up to 72 hours.
Claim 13
Dependent Claim
20 words
The process of claim 12 wherein said photographic material comprises coated layers on both sides of a polyester film support.
Claim 14
Dependent Claim
29 words
The process of claim 11 wherein said material is medical and industrial x-ray film and the step of holding the reverse rewound material extends for up to 72 hours.
Claim 15
Dependent Claim
37 words
The process of claim 11 wherein the step of converting said material into smaller discrete sheets is accomplished by first slitting rolls of the material into narrower rolls and then chopping the material into smaller discrete sheets.
References Cited (Backward Citations)
FR332094A
Cited
US1560670A
Cited
US1807274A
Cited
US2293178A
Cited
US2658432A
Cited
US3030173A
Cited
US3479426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |