Hurdle or rack board for sheet-fed printing machines

Details Hurdle or rack board for sheet-fed printing machines Hurdle or rack board for sheet-fed printing machines

1999-07-12

2000-11-21

Skaggs, H. Grant

Sheet feeding or delivering

Delivering

To receiver for pack of sheets

108 521, 108133, 271287, B65H 3100

Patent

active

061491489

ABSTRACT:
A hurdle board assembly for separating sheet piles in a delivery of a sheet-fed printing machine includes a hurdle board. A plurality of spacer elements are connected to the hurdle board at locations in the vicinity of the border of one surface of the hurdle board. The spacer elements are respectively movable between a condition wherein they are retracted into the hurdle board and a condition wherein they extend vertically from the hurdle board. Respective prestressing devices are provided for prestressing the spacer elements, respectively, in a direction in the condition wherein the spacer elements, respectively, extend from the hurdle board. Respective locking devices are provided for securing the spacer elements, respectively, in the retracted condition. The locking devices are deactivatable from a side of the hurdle board so as to release the spacer elements.

REFERENCES:
patent: 2047389 (1936-07-01), Sinclair
patent: 2267502 (1941-12-01), Lewis
patent: 2690942 (1954-10-01), Marcus
patent: 2799548 (1957-07-01), Arden
patent: 3719157 (1973-03-01), Arcocha et al.
patent: 3857343 (1974-12-01), Greenberg
patent: 5074223 (1991-12-01), Remmers
patent: 5582114 (1996-12-01), Feiner
patent: 5664934 (1997-09-01), Schaede

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