US3570841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for grooving and folding sheet material
Assignee: Kalle GmbH and Co KG
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Filing: 1969-02-03
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Granted: 1971-03-16
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Expires: 1989-02-03
Abstract
Abstract THIS INVENTION RELATES TO AN APPARATUS FOR GROOVING AND FOLDING SHEET MATERIAL, ESPECIALLY PAPER SHEETS, BY MEANS OF ALTERNATELY ENGAGING GROOVING BARS AND GROOVING RECESSES ON TWO ROLLERS ROTATABLE IN OPPOSITE DIRECTIONS, EACH OF THE ROLLERS HAVING LONGITUDINAL GROOVING BARS THEREON AND LONGITUDINAL GROOVING RECESSES THEREIN WHICH PERPENDICULARLY INTERSECT ON EACH ROLLER WITH A TRANSVERSE GROOVING BAR AND A TRANSVERSE GROOVING RECESS, AND INCLUDING A RECEPTABLE FOR ZIGZAG-FOLDING AND COLLECTING THE FOLDED SHEETS.
Inventors
- 👤 Friedrich Rettig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/12; B65H45/30
Claims Analysis
Total Claims: 0
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |