Rotary press
AssigneeKomori Corporation
InventorShinichi Fujishiro
Life of this patent
Estimating the term…
Abstract
In a rotary press, a first press roller adapted to retreat during printing and advance during plate changing to contact a web is provided on a travel route of the web between a printing unit and a dryer. A second press roller having the same function as the first press roller is provided on the travel route of the web between air infeed unit and the printing unit. A web presser for pinching the web is provided on the travel route of the web between the infeed unit and the second press roller. With the web being pinched by the web presser, the first press roller and the second press roller can be moved by the web in a retreating direction. After plate changing is completed, the press rollers can smoothly ascend regardless of their pressure, and can promptly and smoothly return to the state before plate changing.
Claims12
A rotary press for printing a web fed from a feeder by a printing unit, comprising:
- a first wrap preventing member provided on a travel route of the web at a downstream of said printing unit, said first wrap preventing member being adapted to retreat during printing and advance during plate changing to contact the web;
- and
- a pinching member provided on the travel route of the web between said feeder and said printing unit, said pinching member being adapted to pinch the web, so that while the web is being pinched by the pinching member, supply of the web from the feeder is shut off;
- wherein said first wrap preventing member is movable in a retreating direction by the web, when the web is being pinched by said pinching member.
A rotary press for printing a web fed from a feeder by a printing unit, comprising:
- a first wrap preventing member provided on a travel route of the web at a downstream of said printing unit, said first wrap preventing member being adapted to retreat during printing and advance during plate changing to contact the web;
- and
- a pinching member provided on the travel route of the web between said feeder and said printing unit, said pinching member being adpated to pinch the web,
- wherein said first wrap preventing member is movable in a retreating direction by the web, when the web is being pinched by said pinching member;
- said pinching member is composed of a pair of plates, and at least one of said plates is supported so as to be movable toward and away from the other of said plates.
A rotary press or printing a web fed from a feeder by a printing unit, comprising:
- a first wrap preventing member located on a travel route of the web downstream of said printing unit;
- means for retreating during printing and advancing during plate changing to contact the web and,
- providing means for pinching the web so that while the web is pinched by the pinching member, the web from the feeder is stopped.
Dependencies are inferred from the claim text.