US4097042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backstop construction for a stacking machine
Assignee: KELLEY CO Inc
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Filing: 1977-02-25
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Granted: 1978-06-27
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Expires: 1997-02-25
Abstract
Abstract A backstop construction for a sheet stacking machine. The sheet stacking machine includes a vertically movable table to receive sheets to be stacked and a truck is disposed above the table and is mounted to move on the frame in a front to rear direction. A backstop is carried by a carriage that is mounted for movement on the truck, and the backstop is adapted to be engaged by the forward edges of the sheets as they are stacked on the table. Movement of the truck with respect to the frame of the machine will adjust the position of the backstop for various lengths of sheets, and the backstop can also be moved between a rear and forward position on the carriage, so that the entire length of the frame can be utilized to accommodate the shortest and longest lengths of sheets.
Inventors
- 👤 Vincent E. Rozga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:13
CPC Classifications
B; B65; B65H; B65H31/00; B65H31/34; B65H31/36; B65H31/20; B65H2701/00; B65H2701/10; B65H2701/17; B65H2701/176; B65H2701/1762
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
137 words
A machine for stacking sheet material, comprising a supporting structure, a conveyor mounted on the supporting structure to convey sheet material in a given direction, a lift table mounted on the supporting structure and disposed to receive a plurality of sheets and stack the sheets, a truck located above the table and mounted for movement with respect to said table in said direction, a carriage mounted for linear movement on the truck in said direction, said carriage being movable between a first position adjacent the upstream end of the truck to a second position adjacent the downstream end of the truck, latching means to lock the carriage in the first position, and a backstop carried by the carriage and disposed to be engaged by the leading ends of the sheets as they are stacked on the table.
Claim 2
Dependent Claim
137 words
A machine for stacking sheet material, comprising a supporting structure, a conveyor mounted on the supporting structure to convey sheet material in a given direction, a lift table mounted on the supporting structure and disposed to receive a plurality of sheets and stack the sheets, a truck located above the table and mounted for movement with respect to said table in said direction, a carriage mounted for linear movement on the truck in said direction, said carriage being movable between a first position adjacent the upstream end of the truck to a second position adjacent the downstream end of the truck, latching means to lock the carriage in the first position, and a backstop carried by the carriage and disposed to be engaged by the leading ends of the sheets as they are stacked on the table.
Claim 3
Dependent Claim
19 words
The machine of claim 1, wherein said machine includes means to bias the carriage to the second downstream position.
Claim 4
Dependent Claim
35 words
The machine of claim 1, and including a track disposed along each side edge of said truck, said carriage including wheel means mounted on each side thereof and disposed to ride on the respective track.
Claim 5
Dependent Claim
38 words
The machine of claim 1, wherein said latching means comprising a dog pivotally mounted on the carriage and a latch on the truck, said dog being engageable with said latch to latch the carriage in the upstream position.
Claim 6
Dependent Claim
22 words
The machine of claim 1, and including mounting means for mounting the backstop for free vertical movement with respect to the carriage.
Claim 7
Dependent Claim
37 words
The machine of claim 3, and including a second track mounted on each side of the supporting structure, said truck having second wheel means on each side thereof with said second wheel means engaging said second tracks.
Claim 8
Dependent Claim
17 words
The machine of claim 6, and including drive means to drive the truck on said second track.
Claim 9
Dependent Claim
129 words
A machine for stacking sheet material, comprising a supporting structure, a lift table to receive a plurality of sheets being conveyed in a fore-to-aft direction and stack said sheets, said lift table being mounted for vertical movement with respect to the supporting structure, a truck located above the table and mounted for fore-to-aft movement on the supporting structure, a carriage mounted on the truck in said direction, a backstop carried by the carriage and disposed to be engaged by the forward edges of the sheets as they are being stacked on the table, said backstop being movable on said carriage between a rear position and a forward position, biasing means for biasing the backstop to the rear position, and latch means for latching the backstop in the forward position.
Claim 10
Dependent Claim
129 words
A machine for stacking sheet material, comprising a supporting structure, a lift table to receive a plurality of sheets being conveyed in a fore-to-aft direction and stack said sheets, said lift table being mounted for vertical movement with respect to the supporting structure, a truck located above the table and mounted for fore-to-aft movement on the supporting structure, a carriage mounted on the truck in said direction, a backstop carried by the carriage and disposed to be engaged by the forward edges of the sheets as they are being stacked on the table, said backstop being movable on said carriage between a rear position and a forward position, biasing means for biasing the backstop to the rear position, and latch means for latching the backstop in the forward position.
Claim 11
Dependent Claim
49 words
The machine of claim 8, and including a track mounted on each side of the truck, said carriage including wheel means to ride on the respective tracks, and said machine including guide means for maintaining alignment of the carriage on the truck as the carriage moves on said tracks.
Claim 12
Dependent Claim
13 words
The machine of claim 8, wherein said biasing means comprises a torsion spring.
Claim 13
Dependent Claim
101 words
The machine of claim 8, wherein said carriage includes a frame, a shaft extending generally normal to said direction and journalled in said frame, a pinion carried by each end of the shaft, a rack mounted on each side of the truck and disposed to be engaged by the respective pinion, one end of the torsion spring being engaged with the frame and the opposite end of the torsion spring being engaged with the shaft, whereby movement of said carriage toward said forward position will increase the force of said torsion spring to thereby urge said carriage to the rear position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |