Handling, including squaring, of conveyed shingled sheets

Details Handling, including squaring, of conveyed shingled sheets Handling, including squaring, of conveyed shingled sheets

1988-09-29

1990-04-24

Schacher, Richard A.

Sheet feeding or delivering

Feeding

With means to align sheet

271176, 271221, 271240, 271263, 271273, B65H 2922

Patent

active

049194143

ABSTRACT:
A shingle handling and squaring device (18) is disposed between a sheet shingler (5) and stacker (9) and mounted above a stack infeed conveyor (19). The device includes a pair of side carriages (23,24), each of which carries a pair of freely rotatable longitudinally in-line tamping rollers or wheels (29-32), the peripheries of which are adapted to engage an edge of the traveling sheet material (6). The wheels are mounted for rotation about generally vertical but slightly inclined axes (48) and have tapered peripheries (51) so that the wheels nevertheless present truly vertical faces to the sheet material. The wheels are counterbalanced (56). In addition, when the stacker infeed nip roll (17) is raised by the entry of shingled sheets, a device (57-60) is provided to release the nip roll from the sheets to prevent binding. While the nip roll is released, the side carriages are moved transversely inwardly toward the sheet edges in a unique manner such that even off-center sheets are automatically and properly engaged and squared by the tamping wheels before the stacker infeed nip roll is re-engaged with the sheets. Furthermore, an automatic jam detection and releasing arrangement (72,73,57) is associated with the upstream wheels (29,31) and which is responsive to excessive upward wheel lifting about a transverse axis (45).

REFERENCES:
patent: 2528106 (1950-10-01), Albrecht
patent: 2893731 (1959-07-01), Nordquist
patent: 3593989 (1971-07-01), Crittenden
patent: 3974953 (1976-08-01), Klose
patent: 4015843 (1977-04-01), Tennant
patent: 4200276 (1980-04-01), Marschke
patent: 4273325 (1981-06-01), Rodewald
patent: 4598901 (1986-07-01), Thomas
patent: 4776578 (1988-10-01), Hirakawa

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