A stop motion device for a web feed printing press
AssigneeGrafotec Kotterer GmbH
InventorWerner J. Kotterer
Life of this patent
Estimating the term…
Abstract
In the context of a stop motion device for a web feed printing press comprising a web interrupting device placed on the delivery side of a printing unit of the printing press and having a slot for the web from the unit to run, in order to achieve greater ease of operation and functional reliability there is at least one web tear detector switch which is structurally united with the web interrupting device and is adapted to respond to contact with the web and is placed clear of a plane occupied by the web during trouble-free operation of the press and in a position at which there will be an angular deflection of the web, free of tension, caused by an entraining cylinder, when the web tears.
Claims14
A stop motion device for a web feed printing press, comprising:
- a printing unit defining a delivery side from which a web is delivered out of the printing unit;
- web interrupting means located on the delivery side of said printing unit, said web interrupting means having a slot for the passage of the web, the web defining a trouble-free operation plane between the printing unit and the web interrupting means;
- and
- at least one web tear detector switch connected to said web interrupting means and adapted to respond to contact with the web when the web is free of tension and angularly displaced relative to the trouble-free operation plane, caused by a tear in the web.
The stop motion device as claimed in claim comprising at least 15, wherein two web tear detector switches are provided placed on two sides of the web so as to be generally opposite each other.
A stop motion device for a web feed printing press, comprising:
- a printing unit defining a delivery side from which a web is delivered out of the printing unit;
- web interrupting means located on the delivery side of said printing unit, a slot for the passage of the web, the web defining a trouble-free operation plane between the printing unit and the web interrupting means;
- and
- at least one web tear detector switch connected to said web interrupting means and adapted to respond to contact with the web when the web is free of tension and angularly displaced reltive to the trouble-free operation plane, caused by a tear in the web.
A stop motion device for a web feed printing press, comprising:
- a printing unit defining a delivery side from which a web is delivered out of the printing unit;
- web interrupting means located on the delivery side of said printing unit, said web interrupting means having a slot for the passage of the web, the web defining a trouble-free operation plane between the printing unit and the web interruptive means, said web interrupting means including a spool value;
- and
- at least one web tear detector switch connected to said web interrupting means and adapted to respond to contact with the web when the web is free of tension and angularly displaced relative to the trouble-free operation plane, caused by a tear in the web, said at least one detector switch comprising a detector member in the form of a plastic rail, and drive spring means, said detector member being operated by said spool valve.
Dependencies are inferred from the claim text.