US3748737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper perforating device
Assignee: Individual
•
Filing: 1971-03-30
•
Granted: 1973-07-31
•
Expires: 1991-03-30
Abstract
Abstract An inexpensive and portable plastic check perforating apparatus is formed by a single plastic layer with an integral hinge which permits the apparatus to fold flat forming opposing faces adapted to receive paper therebetween. Opposing faces are equipped with a pattern of rigid teeth and mating holes for perforating the check when the faces are pressed together.
Inventors
- 👤 J Duff
- 👤 P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:41
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/32; B26F1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A check canceling device comprising first and second plastic members containing a pattern of plastic teeth and mating recesses respectively for perforating a check positioned therebetween when said members are urged into juxtaposition about an axis, said teeth and recesses being formed in relatively thick mesa portions of said first and second members respectively facing inwardly towards on another, said mesa portion of said second member being of sufficient thickness to avoid penetration of said teeth therethrough, the remaining portions of said members being substantially thinner than said mesa portions having a thickness less than that at which planar dimensional stability is maintained said mesa portion of said first member includes a slot arrangement housing a plurality of elements bearing different patterns of teeth.
Claim 2
Dependent Claim
124 words
A check canceling device comprising first and second plastic members containing a pattern of plastic teeth and mating recesses respectively for perforating a check positioned therebetween when said members are urged into juxtaposition about an axis, said teeth and recesses being formed in relatively thick mesa portions of said first and second members respectively facing inwardly towards on another, said mesa portion of said second member being of sufficient thickness to avoid penetration of said teeth therethrough, the remaining portions of said members being substantially thinner than said mesa portions having a thickness less than that at which planar dimensional stability is maintained said mesa portion of said first member includes a slot arrangement housing a plurality of elements bearing different patterns of teeth.
References Cited (Backward Citations)
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Cited
US553889A
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US1123419A
Cited
US1579758A
Cited
US1943404A
Cited
US3579883A
Cited
US3612233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |