US3799536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper folder
Assignee: Baldwin Technology Corp
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Filing: 1972-04-21
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Granted: 1974-03-26
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Expires: 1992-04-21
Abstract
Abstract A paper folder as used in the printing industry, usually done after printing has been applied to both sides of the paper. The folding is accomplished by bringing a strip of paper from an outwardly spaced position into a plane carrying paper folding mechanisms. The paper is folded over a straight side edge of a thin flat sheet. The side edge is disposed at a position offset from the side edge of the paper to be folded. A small diameter freely journalled roller is arranged to press a folded over portion of the paper against the flat sheet while the remaining or unfolded portion of the paper runs on the other side of the flat sheet. A pair of cooperative driven rolls pulls the paper through the folding operation. In addition to folding the paper the invention provides for the optional cutting of the folded over portion from the unfolded portion.
Inventors
- 👤 C Gregoire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/12; B65H45/28; B65H45/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
300 words
The combination of a paper folder and slitter for the printing industry comprising a substantially horizontal flat plate having a forward end and an opposite rearward end, means at said forward end of said plate supplying a strip of paper along a fixed path to the underside of said plate, cooperative feed rolls at the rearward end of said plate arranged and constructed to pull said strip of paper past said plate, means folding said strip of paper around a side folding edge extending between said forward and rearward ends of said plate, said strip of paper having one side edge thereof extending outwardly past the side folding edge of said plate, said means folding said strip of paper including a small diameter paper pressing roller, said side folding edge of the plate in combination with the small diameter paper pressing roller causing said outwardly extending side edge of the paper to be folded over the folding edge and pressed down on the top side of said plate and defining overlapped layers of paper, means transversely adjusting said plate relative to said fixed path to cause a greater or lesser degree of paper extension for fold over of the paper strip along the folding edge of the plate, a stationary elongated slitting knife, means mounting said stationary slitting knife transversely of said path on said plate and projecting outwardly beyond the folding edge of the plate at a location on said plate following said means folding the strip of paper, said slitting knife entering between the overlapped layers of paper and acting to slit said paper along the fold line as cooperative feed rolls pull the paper strip past said plate whereby the paper discharged from the cooperative feed rolls is in separate sheets one on top of the other.
Claim 2
Dependent Claim
300 words
The combination of a paper folder and slitter for the printing industry comprising a substantially horizontal flat plate having a forward end and an opposite rearward end, means at said forward end of said plate supplying a strip of paper along a fixed path to the underside of said plate, cooperative feed rolls at the rearward end of said plate arranged and constructed to pull said strip of paper past said plate, means folding said strip of paper around a side folding edge extending between said forward and rearward ends of said plate, said strip of paper having one side edge thereof extending outwardly past the side folding edge of said plate, said means folding said strip of paper including a small diameter paper pressing roller, said side folding edge of the plate in combination with the small diameter paper pressing roller causing said outwardly extending side edge of the paper to be folded over the folding edge and pressed down on the top side of said plate and defining overlapped layers of paper, means transversely adjusting said plate relative to said fixed path to cause a greater or lesser degree of paper extension for fold over of the paper strip along the folding edge of the plate, a stationary elongated slitting knife, means mounting said stationary slitting knife transversely of said path on said plate and projecting outwardly beyond the folding edge of the plate at a location on said plate following said means folding the strip of paper, said slitting knife entering between the overlapped layers of paper and acting to slit said paper along the fold line as cooperative feed rolls pull the paper strip past said plate whereby the paper discharged from the cooperative feed rolls is in separate sheets one on top of the other.
Claim 3
Dependent Claim
38 words
A device as set forth in claim 1 in which said means mounting said stationary slitting knife includes an adjustable means to permit various degrees of projecting of said slitting knife beyond the folding edge of the plate.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |