Apparatus for controlling timings of throwing on or off cylinders of printing press
AssigneeKomori Printing Machinery Co., Ltd.
InventorTamio Kuroda
Life of this patent
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Abstract
In a printing press including an intaglio cylinder, an impression cylinder and a blanket cylinder, for the purpose of throwing on and off these cylinders there is provided a control apparatus comprising a first detection switch which produces a selection signal when a rotating radial projection passes by, and a plurality of second detection switches which generate timing signals when passing by a plurality of radially spaced projections. The selection signal is used to select either one of the second selection switches, and the timing signal generated by a selected second detection switch is used to throw on and off the cylinders. According to this invention it is not necessary to use a number of expensive multistage preset counters which are liable to misoperate due to noise.
Claims3
Apparatus for controlling timings of throwing on and off cylinders of a printing press comprising:
- a first detection member mounted on a driving shaft of a n times cylinder, where n is an integer larger than 2;
- n first detection means for producing selection signals when said first detection member passes by, said first detection means being spaced circumferentially by an equal angle;
- a plurality of second detection members mounted on said driving shaft at predetermined angular positions;
- n second detection means for producing timing signals when said second detection members pass by, said second detection means being spaced circumferentially by an equal angle;
- means for selecting either one of said second detection means according to said selection signal;
- and
- means responsive to a timing signal produced by said selected second detection means for throwing on or off cylinders of said printing press.
Dependencies are inferred from the claim text.