Sheet feeding unit for rotary printing machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 4, 1992
Grant Date -
N/A
app pub date -
Sep 20, 1991
filing date -
Sep 22, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sheet feeding unit for a rotary sheet printing machine which is operative for selective face printing or face and back printing with turning of a sheet rear edge and which has a turning cylinder and a printing cylinder located before the turning cylinder, includes elements located underneath the turning drum and the printing drum for conducting and guiding overlong sheets in face and back printing during a turning step on a front edge. The elements include a suction member arranged rotatably over a circular path so as to take over a sheet in a point of intersection of tangent t.sub.s, a stationary segment arch arranged equidistantly relative to the circular path under a point of intersection T.sub.4,5 of the printing cylinder and a sheet guiding cylinder and also provided with guiding rollers, and a guiding plate located above a turning point of the suction member at a distance from the printing cylinder and inside the circular path over a line of a secante.
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