Patent US4019731A successfully refreshed from Google Patents.
US4019731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for placement of rhythmically conveyed sheets on a stack
Assignee: Vits Maschinenbau GmbH
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Filing: 1976-07-20
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Granted: 1977-04-26
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Expires: 1996-07-20
Abstract
Abstract The invention relates to a device for sheet-by-sheet feeding and placing the sheets on a stack, the sheets being conveyed rhythmically one after another, including a conveyor means and a suction braking means disposed below a conveying plane, for transporting the sheets into an effective range of the suction braking means; the ends of the sheets may be held and transported by a deflecting member which is arranged above the conveying plane.
Inventors
- 👤 Hilmar Vits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:29
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/24; B65H29/241; B65H29/243; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/421; B65H2301/4212
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
98 words
A device for placing rhythmically conveyed sheets from a conveying plane individually on a stack one after another, comprising a conveyor means for conveying the sheets, and a suction means for braking the speed of the sheets below the conveying plane, a deflecting member disposed above the conveying plane for passing the ends of the sheets into effective range of said suction means, said deflecting member being a suction conveyor roller having a plurality of projections on its periphery and rotating rhythmically with the ends of the sheets for the sheet ends to be placed on said projections.
Claim 2
Independent Claim
98 words
A device for placing rhythmically conveyed sheets from a conveying plane individually on a stack one after another, comprising a conveyor means for conveying the sheets, and a suction means for braking the speed of the sheets below the conveying plane, a deflecting member disposed above the conveying plane for passing the ends of the sheets into effective range of said suction means, said deflecting member being a suction conveyor roller having a plurality of projections on its periphery and rotating rhythmically with the ends of the sheets for the sheet ends to be placed on said projections.
Claim 3
Dependent Claim
20 words
A device according to claim 1, wherein said suction conveyor roller is perforated only in an area outside said projection.
Claim 4
Dependent Claim
23 words
A device according to claim 1, wherein said braking means comprises a suction table extending in the conveying direction behind said deflecting member.
Claim 5
Dependent Claim
21 words
A device according to claim 3, wherein said suction table comprises a plurality of rollers disposed closely next to one another.
Claim 6
Dependent Claim
23 words
A device according to claim 4, wherein each of said rollers is driven in the sheet conveying direction at gradually decreasing rotational speed.
Claim 7
Dependent Claim
26 words
A device according to claim 4, wherein the suction-table rollers comprise first and second rollers driven at the same rotational speed in the sheet conveying direction.
Claim 8
Dependent Claim
22 words
A device according to claim 4, wherein said rollers comprise last and next to last rollers driven at the same rotational speed.
Claim 9
Dependent Claim
19 words
A device according to claim 7, wherein said last roller has a substantially smaller diameter than the remaining rollers.
Claim 10
Independent Claim
40 words
A device according to one of claims 1, wherein said conveyor means comprise a plurality of floating bars operated by compressed air disposed and driven behind said deflecting member as seen in the sheet conveyance direction above said conveying plane.
Claim 11
Dependent Claim
22 words
A device according to claim 1, further comprising a cutter arranged in front of said deflecting member and driven in synchronization therewith.
Claim 12
Dependent Claim
25 words
A device according to claim 4, further comprising a material having a high coefficient of friction for coating said rollers of said suction table therewith.
Claim 13
Dependent Claim
30 words
A device according to claim 4, wherein respective spaces are formed between said rollers, and further comprising a plurality of loosely lying and threaded rods arranged in said spaces, respectively.
Claim 14
Dependent Claim
20 words
A device according to claim 12, further comprising an anti-adhesive material for coating said threaded rods on the surfaces thereof.
Claim 15
Dependent Claim
28 words
A device according to claim 6, wherein the suction-table rollers have axially spaced raised rings on their peripheries, respectively, for respective adjacent rollers to intermesh with each other.
Claim 16
Dependent Claim
30 words
A device according to claim 6, wherein said first roller is disposed opposite said suction conveyor rollers and has a substantially larger diameter than the remaining of the suction-table rollers.
Claim 17
Dependent Claim
26 words
A device according to claim 14, wherein the raised rings of at least said first roller are perforated for communicating with at least a part vacuum.
Claim 18
Dependent Claim
50 words
A device according to claim 6, wherein said suction table comprises two suction boxes exposed to at least a part vacuum, one of said suction boxes being positioned in the area of said first roller, and being exposed to a substantially greater vacuum than the other of said suction boxes.
Claim 19
Dependent Claim
29 words
A device according to claim 17, wherein said suction table is formed with an opening connecting said suction boxes, and further comprising a throttle flap disposed within said opening.
References Cited (Backward Citations)
US3848752A
Cited
US3941374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |