US3173683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeding machines
Assignee: Headley Townsend Backhouse
•
Filing: 1962-09-27
•
Granted: 1965-03-16
•
Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Tebbs George William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:02
CPC Classifications
B; B65; B65H; B65H9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A SHEET FEEDING MACHINE OF THE KIND COMPRISING A FEED TABLE OVER WHICH A SUCCESSION OF SHEETS MAY BE FED AND AT LEAST ONE FRONT LAY ENGAGEABLE BY THE LEADING EDGE OF EACH SHEET IN TURN, A SHEET HOLD-DOWN DEVICE COMPRISING A CHAMBER WHICH IS INTERNALLY OF CIRCULAR CROSSSECTION, WHICH HAS AT ONE END A MOUTH OPEN AT THE SURFACE OF THE TABLE TO THE UNDERSIDE OF THE SHEETS AND WHICH HAS, IN ADDITION TO THE MOUTH, AT LEAST ONE OUTLET OPENING IN A WALL OF THE CHAMBER AND AN AIR NOZZLE WHICH ENTERS THE CHAMBER IN A TANGENTIAL DIRECTION AT A POSITION WHICH IS REMOTE FROM THE MOUTH, AND MEANS FOR INTRODUCING A SUPPLY OF SAID UNDER POSITIVE PRESSURE THROUGH THE NOZZLE TO CREATE A VORTEX WITHIN THE CHAMBER AND THEREFORE AN AREA OF REDUCED PRESSURE WITHIN THE MOUTH AFORESAID TENDING TO SUCH THE SHEETS DOWN ONTO THE TABLE.
Claim 2
Dependent Claim
151 words
IN A SHEET FEEDING MACHINE OF THE KIND COMPRISING A FEED TABLE OVER WHICH A SUCCESSION OF SHEETS MAY BE FED AND AT LEAST ONE FRONT LAY ENGAGEABLE BY THE LEADING EDGE OF EACH SHEET IN TURN, A SHEET HOLD-DOWN DEVICE COMPRISING A CHAMBER WHICH IS INTERNALLY OF CIRCULAR CROSSSECTION, WHICH HAS AT ONE END A MOUTH OPEN AT THE SURFACE OF THE TABLE TO THE UNDERSIDE OF THE SHEETS AND WHICH HAS, IN ADDITION TO THE MOUTH, AT LEAST ONE OUTLET OPENING IN A WALL OF THE CHAMBER AND AN AIR NOZZLE WHICH ENTERS THE CHAMBER IN A TANGENTIAL DIRECTION AT A POSITION WHICH IS REMOTE FROM THE MOUTH, AND MEANS FOR INTRODUCING A SUPPLY OF SAID UNDER POSITIVE PRESSURE THROUGH THE NOZZLE TO CREATE A VORTEX WITHIN THE CHAMBER AND THEREFORE AN AREA OF REDUCED PRESSURE WITHIN THE MOUTH AFORESAID TENDING TO SUCH THE SHEETS DOWN ONTO THE TABLE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |