Apparatus for attaching sheets to groups of leaves in bookbindin

Details Apparatus for attaching sheets to groups of leaves in bookbindin Apparatus for attaching sheets to groups of leaves in bookbindin

1976-09-01

1978-03-28

Pellegrino, Stephen C.

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11 4, 270 53, 271271, B42C 1900

Patent

active

040806782

ABSTRACT:
Cover lining sheets are attached to adhesive-coated edge faces of groups of leaves in a bookbinding machine while the groups are held and advanced by grippers along a first horizontal path. The sheets are fed in front of successive pushers which thereupon advance along a second horizontal path below the first path and alternate with the grippers. The speed of pushers is increased during a first stage of movement along the second path so that the pushers catch up with and thereupon move at the speed of the preceding grippers during transfer of sheets to the edge faces of the groups thereabove. The speed of the pushers is thereupon reduced to a speed which is less than the speed of the grippers. The grippers are attached to an endless chain and each pusher is attached to two endless chains. The drive for the two endless chains which carry the pushers has two units one of which can drive the two chains at a constant speed exceeding the speed of the grippers and the other of which can change the speed of the chains during the aforementioned stages of movement of pushers along the second path.

REFERENCES:
patent: 2422996 (1947-06-01), Wendt
patent: 2962733 (1960-12-01), Kramer et al.

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