US3867031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for assuring contact between thin sheets of material
Assignee: Kimberly Clark Tissue Co
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Filing: 1974-02-07
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Granted: 1975-02-18
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Expires: 1994-02-07
Abstract
Abstract Method and apparatus for assuring contact between superposed thin sheets of material transported on a movable carriage in which a freely rotatable, resilient roll is disposed above the carriage at a spacing less than the roll radius such that movement of the carriage past the roll causes engagement of the same such that the roll is flattened and pressed against the superposed sheets on the carriage and rotated thereby to assure positive contact between the sheets while precluding relative movement therebetween.
Inventors
- 👤 Nils L Hakanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/04; G03B27/06; G03B27/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
Apparatus for establishing firm contact between superposed thin sheets of material, comprising: a frame; a support carriage mounted on said frame for carrying said superposed thin sheets of material; and a freely rotatable, resilient roll disposed above said carriage at a spacing therefrom less than the roll radius, said roll being engaged by said carriage as the same transports said superposed sheets past said roll such that the roll is flattened and pressed against said superposed sheets on the carriage, said roll being journalled for free rotation on said frame whereby said roll is rotated by said carriage in synchronism therewith to preclude relative movement between said sheets.
Claim 2
Dependent Claim
108 words
Apparatus for establishing firm contact between superposed thin sheets of material, comprising: a frame; a support carriage mounted on said frame for carrying said superposed thin sheets of material; and a freely rotatable, resilient roll disposed above said carriage at a spacing therefrom less than the roll radius, said roll being engaged by said carriage as the same transports said superposed sheets past said roll such that the roll is flattened and pressed against said superposed sheets on the carriage, said roll being journalled for free rotation on said frame whereby said roll is rotated by said carriage in synchronism therewith to preclude relative movement between said sheets.
Claim 3
Dependent Claim
38 words
The apparatus of claim 1 wherein said carriage is linearly moveable on said frame under said roll, and said apparatus is part of a microfiche duplicator and establishes firm contact between an original and copy sheet of microfiche.
Claim 4
Dependent Claim
11 words
The apparatus of claim 2 wherein said roll is generally cylindrical.
Claim 5
Dependent Claim
21 words
The apparatus of claim 2 wherein said roll has a rigid central core surrounded by a cylinder of resilient foamed material.
Claim 6
Dependent Claim
36 words
The apparatus of claim 2 wherein said carriage has an upper surface formed of a substantially flat main portion and a downwardly offset front portion contiguous with said main portion to facilitate engagement of said roll.
Claim 7
Dependent Claim
13 words
The apparatus of claim 2 wherein said carriage includes a flat, light-transmissive plate.
Claim 8
Dependent Claim
39 words
The apparatus of claim 6 wherein said resilient roll is substantially opaque such that the same provides a substantially uniform background for exposure of one thin sheet of film through the other as said carriage moves under said roll.
Claim 9
Independent Claim
92 words
A method for maintaining contact between thin sheets of material, comprising the steps of: placing a plurality of thin sheets on a carriage mounted for linear movement on a frame and spaced from a freely rotatable resilient roll at a distance less than the roll radius; and moving said carriage along said frame under said roll such that said roll is engaged and rotated thereby, said movement of said carriage flattening said roll against the upper surface of said carriage to place said sheets in positive contact without permitting relative movement therebetween.
Claim 10
Independent Claim
92 words
A method for maintaining contact between thin sheets of material, comprising the steps of: placing a plurality of thin sheets on a carriage mounted for linear movement on a frame and spaced from a freely rotatable resilient roll at a distance less than the roll radius; and moving said carriage along said frame under said roll such that said roll is engaged and rotated thereby, said movement of said carriage flattening said roll against the upper surface of said carriage to place said sheets in positive contact without permitting relative movement therebetween.
Claim 11
Dependent Claim
24 words
The method of claim 8 wherein said sheet placing step includes placing an original and copy sheet of microfiche in superposition on said carriage.
Claim 12
Dependent Claim
32 words
The method of claim 9 further including exposing the original and copy sheet of microfiche to an exposure light while said sheets are held in positive contact without permitting relative movement therebetween.
References Cited (Backward Citations)
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |