Apparatus for singularizing and opening stacked folded sheets

Details Apparatus for singularizing and opening stacked folded sheets Apparatus for singularizing and opening stacked folded sheets

1980-02-28

1981-11-10

Fisher, J. Reed

Sheet-material associating

Associating or disassociating

Signature associating

B65H 3902

Patent

active

042993784

ABSTRACT:
Apparatus for singularizing and opening stacked folded sheets, wherein one marginal portion of each sheet opposite the fold projects beyond the adjacent marginal portion, has a magazine for a stack of such sheets, a rotary drum which withdraws successive sheets from the magazine in such a way that the two marginal portions are located at the lower end of the withdrawn sheet, two rotary opening devices mounted below the drum and having grippers for the marginal portions of the withdrawn sheet, and a plate-like straightening device which is mounted between the opening devices and is pivoted against the marginal portions of the withdrawn sheet to flatten the projecting marginal portion and to place the flattened marginal portion into the path of movement of the gripper on one of the opening devices. The straightening device is thereupon withdrawn to allow the shorter marginal portion to move into the path of movement of the gripper of the other opening device. The purpose of the straightening device is to insure predictable engagement of the gripper of the one opening device with the projecting marginal portion of the withdrawn sheet even if such projecting marginal portion was deformed during the preceding stage or stages of manipulation of the respective sheet.

REFERENCES:
patent: 2251943 (1941-08-01), Kleineberg
patent: 2413358 (1946-12-01), Kleineberg
patent: 3087721 (1963-04-01), McCain
patent: 3809384 (1974-05-01), Zugel

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