US3692304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding and stacking loose paper sheets
Assignee: Ridder Ingb Nv De
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Filing: 1971-04-07
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Granted: 1972-09-19
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Expires: 1991-04-07
Abstract
Abstract An apparatus for feeding and stacking loose paper sheets having a stacking station with an upstanding end stop for the sheets to be stacked and a lower and upper endless conveyor belt for clamping the sheets to be stacked therebetween and feeding the sheets to the stacking station. The lower conveyor belt extends underneath the stacking station and the upper conveyor belt passes around a return roller arranged a small distance upstream of the stacking station. Side guide members are arranged on each side of the lower conveyor belt for supporting the side portions of the sheets which side guide members are inclined from the lower conveyor belt downwardly and outwardly whereby the sheets are bent in the transverse direction. The side guide members and the lower conveyor belt have portions extending obliquely upward in the direction of feed of the sheets from a point lying upstream of the forward or upstream side of the stacking station to a point lying under the stacking station whereby any sheet fed without being overlapped by the preceding sheet can be pushed without disturbance, and without damaging its front edge, under the stack formed at the stacking station.
Inventors
- 👤 Gerardus Johannes De Ridder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:16
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/12; B65H29/14; B65H29/66; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/421; B65H2301/4212; B65H2301/42122; B65H2701/00; B65H2701/10; B65H2701/19; B65H2701/1932
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
277 words
An apparatus for feeding and stacking loose paper sheets comprising a stacking station having a forward and a rear side, a driven lower endless conveyor belt extending under said stacking station and returning at a point downstream of the latter, an upper endless conveyor belt, a return roller for said upper conveyor belt arranged a short distance upstream of said stacking station, means for mounting said return roller for vertical movement while urging said roller downwards whereby said lower and upper conveyor belts may clamp the sheets to be stacked between them in the central area thereof to feed said sheets to said stacking station, said stacking station having an upstanding end stop for said sheets disposed at the front or downstream side thereof, two lateral guide members one arranged on each side of said lower conveyor belt for supporting side portions of said sheets laterally of said sheet central area, said lateral guide members being inclined from said lower conveyor belt downwardly and laterally outwardly whereby said sheets assume a curved shape in the transverse direction, said lateral guide members having portions extending obliquely upwards in the feed direction of the sheets from a point lying upstream of the rear or upstream side of said stacking station to a point lying under said stacking station, and means for guiding said lower conveyor belt obliquely upwards from a point lying upstream of said rear side of said stacking station to a point under said stacking station whereby any sheet fed without being overlapped by the preceding sheet can be pushed without disturbance and without damage to its front edge under the stack formed at the stacking station.
Claim 2
Independent Claim
277 words
An apparatus for feeding and stacking loose paper sheets comprising a stacking station having a forward and a rear side, a driven lower endless conveyor belt extending under said stacking station and returning at a point downstream of the latter, an upper endless conveyor belt, a return roller for said upper conveyor belt arranged a short distance upstream of said stacking station, means for mounting said return roller for vertical movement while urging said roller downwards whereby said lower and upper conveyor belts may clamp the sheets to be stacked between them in the central area thereof to feed said sheets to said stacking station, said stacking station having an upstanding end stop for said sheets disposed at the front or downstream side thereof, two lateral guide members one arranged on each side of said lower conveyor belt for supporting side portions of said sheets laterally of said sheet central area, said lateral guide members being inclined from said lower conveyor belt downwardly and laterally outwardly whereby said sheets assume a curved shape in the transverse direction, said lateral guide members having portions extending obliquely upwards in the feed direction of the sheets from a point lying upstream of the rear or upstream side of said stacking station to a point lying under said stacking station, and means for guiding said lower conveyor belt obliquely upwards from a point lying upstream of said rear side of said stacking station to a point under said stacking station whereby any sheet fed without being overlapped by the preceding sheet can be pushed without disturbance and without damage to its front edge under the stack formed at the stacking station.
Claim 3
Dependent Claim
103 words
The apparatus of claim 1 further comprising a support member for said lower conveyor belt having an aperture extending from a point some distance upstream of to a point some distance downstream of said rear side of said stacking station and underneath said return roller for said upper conveyor belt, and a supporting roller for said lower conveyor belt arranged in said aperture in a position in which its axis lies upstream of the axis of said upper conveyor belt return roller whereby downstream of said supporting roller the lower conveyor belt can be pressed downwards in a curve by said return roller.
Claim 4
Dependent Claim
69 words
The apparatus of claim 2 in which said support member for said lower conveyor belt comprises a channel section arranged with its lateral flanges directed downwards, said channel section having a web which is wider than the lower conveyor belt, said web being cut out to form said aperture and said supporting roller being arranged between the flanges of said channel section and projecting from below into this cutout.
Claim 5
Dependent Claim
86 words
The apparatus of claim 2 in which said lateral guide members comprise guide plates adjoining said support member for said lower conveyor belt and extending obliquely and laterally downwards therefrom, said guide plates each merging from a point situated a short distance upstream of said rear side of said stacking station, by way of a transition portion extending obliquely upwards in the feed direction of the sheets, from a determined lateral inclination upstream of said stacking station into a lesser lateral inclination under said stacking station.
Claim 6
Dependent Claim
45 words
The apparatus of claim 4 further cOmprising pressure roller means arranged on both sides of said upper conveyor belt a short distance upstream of said stacking station, said auxiliary roller means being adapted to press said side portions of said sheets against said guide plates.
Claim 7
Dependent Claim
52 words
The apparatus according to claim 2 in which said return roller for said upper conveyor belt and said supporting roller for said lower conveyor belt are together mounted for adjustment in the longitudinal direction of the apparatus whereby the latter can be adapted to the size of the sheets to be stacked.
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |