Marker for confirmation of paper web-threaded paths and paper we

Details Marker for confirmation of paper web-threaded paths and paper we Marker for confirmation of paper web-threaded paths and paper we

1990-12-14

1992-02-18

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101248, B41F 504, B41F 1302, B41F 3316

Patent

active

050884034

ABSTRACT:
A marker is used for the confirmation of the paper web-threaded paths for rotary presses. The marker includes a marking unit for putting a mark on a paper web and a regulator composed of 1) a timing detector to detect the rotational phase of a printing cylinder and transmit a detected timing signal and 2) a transmitter to transmit an operating signal to the marking unit when it receives a detected timing signal from the timing detector. The regulator control when a mark is put on the paper web by the marking unit so that the mark always has a predetermined phase with respect to the printed images produced during a printing operation. A paper web-threaded path confirming apparatus includes a mark detector to detect a mark put on the paper web by the marking unit and transmit a detected mark signal. A transmitter transmits a rotational phase signal relatively to the rotational phase of a cutter cylinder rotated in a folder unit. An examination unit examines whether or not the detected mark signal transmitting time is within a predetermined range of the rotational phase signal, when the detected mark signal and rotational phase signal are input thereinto. The marker and confirming apparatus enables the confirming of the paper web-threaded paths and the feeding of an erroneously threaded paper web into a proper path to be done before images have been printed actually thereon, and prevents a delay in starting a production printing operation.

REFERENCES:
patent: 2549605 (1951-04-01), Huck
patent: 4366753 (1983-01-01), Glanz
"Newspaper Letterpress Presses", Research Institute 1970, pp. 126-138, ANPA Research Institute, N.Y., N.Y.

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