US3781124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper plug removal from drilled reams
Assignee: Domtar Inc
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Filing: 1972-02-22
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Granted: 1973-12-25
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Expires: 1992-02-22
Abstract
Abstract A device for drilling reams of paper utilizing a hollow drill and compressed air to eject the plugs formed by the drill up through the drill to an accumulating station.
Inventors
- 👤 Bodycomb A Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/18; B26D7/1845; B26D7/1854; B23; B23B; B23B35/00; B23B35/005; B23Q; B23Q11/00; B23Q11/0042; B23Q11/005; B26F; B26F1/00; B26F1/16; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/46; Y10T408/50; Y10T408/51; Y10T408/55; Y10T408/561; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/929; Y10T83/9309
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
A drilling mechanism for drilling the holes through a stack of paper sheets comprising a hollow drill having a cutting edge and an axial passage therethrough, said cutting edge cutting on a radius larger than said passage, means to rotate said drill, a replaceable anvil member having an aperture aligned with said passage, means for preventing rotation of said anvil member, means for axially advancing said drill to cut successively through said paper sheets and into said anvil member thereby to form a plurality of discrete paper discs, means for directing air under pressure to said aperture, means for controlling the flow of said air under pressure to said aperture and into said passage whereby a plug composed of a plurality of said discrete discs is ejected through said passage by said air under pressure immediately after formation of said plug.
Claim 2
Dependent Claim
141 words
A drilling mechanism for drilling the holes through a stack of paper sheets comprising a hollow drill having a cutting edge and an axial passage therethrough, said cutting edge cutting on a radius larger than said passage, means to rotate said drill, a replaceable anvil member having an aperture aligned with said passage, means for preventing rotation of said anvil member, means for axially advancing said drill to cut successively through said paper sheets and into said anvil member thereby to form a plurality of discrete paper discs, means for directing air under pressure to said aperture, means for controlling the flow of said air under pressure to said aperture and into said passage whereby a plug composed of a plurality of said discrete discs is ejected through said passage by said air under pressure immediately after formation of said plug.
Claim 3
Dependent Claim
21 words
A mechanism as defined in claim 1 wherein said replaceable anvil member is formed from an ultra-high molecular weight polyolefin polymer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |