Patent US3232808A successfully refreshed from Google Patents.
US3232808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing loose-leaf reinforced sheets
Assignee: Western Tablet and Stationery Corp
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Filing: 1962-08-16
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Granted: 1966-02-01
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Expires: 1982-08-16
Abstract
No abstract record available.
Inventors
- 👤 Robert H Dries
- 👤 Joseph J Louda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:36
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/27; B26D7/34; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/133
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE METHOD OF MANUFACTURING SHEETS OF PAPER AND THE LIKE HAVING REINFORCED HOLS FOR ENGAGING RETAINERS IN A LOOSE-LEAF BINDER, COMPRISING THE STEPS OF (A) APPLYING PATCHES OF THIN REINFORCING MATERIAL TO A MOVING WEB OF PAPER AT PREDETERMINED LOCATIONS OF HOLES IN INDIVIDUAL SHEETS TO BE FORMED FROM THE WEB, (B) HOLDING THE PATCHES IN THEIR EXACT PLACE ON THE WEB BY A VACUUM APPLIED TO THE OPPOSITE SIDE OF THE MOVING WEB FROMTHE SIDE TO WHICH THE PATCHES ARE APPLIED FOR AN EXTENDED PART OF THE PATH OF TRAVEL OF THE WEB, (C) HEATING THE WEB DURING AT LEAST A SUBSTANTIAL PORTION OF SAID PART OF ITS TRAVEL PATH TO BOND THE PATCHES ONTO THE WEB, (D) FORMING HOLES THROUGH THE COMBINED PATCHES AND WEB, AND (E) SEPARATING THE WEB INTO INDIVIDUAL SHEETS.
Claim 2
Independent Claim
135 words
THE METHOD OF MANUFACTURING SHEETS OF PAPER AND THE LIKE HAVING REINFORCED HOLS FOR ENGAGING RETAINERS IN A LOOSE-LEAF BINDER, COMPRISING THE STEPS OF (A) APPLYING PATCHES OF THIN REINFORCING MATERIAL TO A MOVING WEB OF PAPER AT PREDETERMINED LOCATIONS OF HOLES IN INDIVIDUAL SHEETS TO BE FORMED FROM THE WEB, (B) HOLDING THE PATCHES IN THEIR EXACT PLACE ON THE WEB BY A VACUUM APPLIED TO THE OPPOSITE SIDE OF THE MOVING WEB FROMTHE SIDE TO WHICH THE PATCHES ARE APPLIED FOR AN EXTENDED PART OF THE PATH OF TRAVEL OF THE WEB, (C) HEATING THE WEB DURING AT LEAST A SUBSTANTIAL PORTION OF SAID PART OF ITS TRAVEL PATH TO BOND THE PATCHES ONTO THE WEB, (D) FORMING HOLES THROUGH THE COMBINED PATCHES AND WEB, AND (E) SEPARATING THE WEB INTO INDIVIDUAL SHEETS.
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) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |