US3601391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feeding mechanism
Assignee: Timsons Ltd
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Filing: 1969-02-03
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Granted: 1971-08-24
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Expires: 1989-02-03
Abstract
Abstract Sheet feeding mechanism for a printing or like machine, comprising a tape conveyor for feeding individual sheets successively to stops and a slow down device for preventing the sheets rebounding from the latter or impact therewith. Device comprises two pairs of feed rollers driven at a slower rotational speed than the linear speed of the tape conveyor, the sheets being fed through the nips of said pairs of rollers. One roller in each pair is arcuately gapped around part of its circumference so that each sheet is released by the rollers at an appropriate time.
Inventors
- 👤 Charles Hillingdon Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:59
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
188 words
A sheet feeding mechanism comprising: sheet stop means; tape conveyor means for carrying individual sheets or sections of a relatively thin and flexible material in turn up to said stop means and comprising a pair of tapes defining a sheet conveying path along which said pair of tApes engage opposite sides of said sheet or section to convey same along said path to said stop means; sheet speed slowdown means comprising two coaxial pairs of cooperable feed rollers disposed on opposite sides of said sheet and arranged with their nips located for gripping sheet margins laterally outside of the sides of the conveyor tapes intermediate the ends of said sheet conveying path along which a conveyed sheet is in engagement with said tapes, said feed rollers being arranged with their nip in the path of said sheet or sections for gripping engagement with opposite sides thereof; means for driving said feed rollers at a rotational speed slower than the rectilinear speed of the tape conveyor; and means for relieving said nip coincidentally with the arrival of the leading edge of a sheet or section at said stop means.
Claim 2
Dependent Claim
188 words
A sheet feeding mechanism comprising: sheet stop means; tape conveyor means for carrying individual sheets or sections of a relatively thin and flexible material in turn up to said stop means and comprising a pair of tapes defining a sheet conveying path along which said pair of tApes engage opposite sides of said sheet or section to convey same along said path to said stop means; sheet speed slowdown means comprising two coaxial pairs of cooperable feed rollers disposed on opposite sides of said sheet and arranged with their nips located for gripping sheet margins laterally outside of the sides of the conveyor tapes intermediate the ends of said sheet conveying path along which a conveyed sheet is in engagement with said tapes, said feed rollers being arranged with their nip in the path of said sheet or sections for gripping engagement with opposite sides thereof; means for driving said feed rollers at a rotational speed slower than the rectilinear speed of the tape conveyor; and means for relieving said nip coincidentally with the arrival of the leading edge of a sheet or section at said stop means.
Claim 3
Dependent Claim
26 words
A sheet feeding mechanism according to claim 1 wherein said tape conveyor means comprises a single tape disposed on either side of said sheet conveying path.
Claim 4
Dependent Claim
95 words
A mechanism according to claim 1 wherein the upper feed roller of each pair is driven, is of larger diameter than the lower roller and is arcuately gapped around an appropriate extent of its circumference so that the nip of the cooperable rollers is established and maintained for part only of each revolution when the rollers are required to grip and slow down an oncoming sheet or section, this nip being relieved by the gap between the rollers for the remainder of the same revolution when the said sheet or section reaches said stop means.
References Cited (Backward Citations)
US1112791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |