US 4,026,404 AGranted

Apparatus for the bodily shifting of a printing roller

OwnerGottfried Burkhardtinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

An apparatus for the bodily shifting of a printing roller in parallelism with itself in which the roller has a first printing position and a second printing position and is mounted on connecting rods or levers which are actuated by eccentrics for movement of the printing roller between its first and second positions. A drive shaft is provided and the eccentrics are driveable by the drive shaft by a coil spring surrounding the drive shaft which can be tightened up on the shaft to cause the shaft to drive the spring or loosened on the shaft to cause the shaft to rotate within the spring. The spring has its opposite ends connected to discs and is tensioned in the tightening up direction and the discs are adapted to be stopped by a pawl arrangement which holds the discs with the spring in loosened up position and is movable to release the discs of the spring and will tighten up on the shaft and be driven thereby.

Claims4

Dependent claims

An apparatus for moving a printing roller in parallelism with itself between a first printing position and a second printing position which comprises;

lever means connected at one end to the roller, eccentric means engaging said lever means for actuation of the lever means and therethrough said printing roller, a driven shaft, and intermittently operable coupling means connecting said shaft to said eccentric means for effecting rotation of the eccentric means, said coupling means including a pair of axially spaced discs rotatable on said shaft, a coil spring having one end connected to each disc and surrounding said shaft and biased in a direction to tighten on said shaft when said discs are free on said shaft, said eccentric means being connected to one of said discs to rotate therewith, and pawl means engageable with said discs for holding said discs against rotation and in such relatively rotated position that said spring is loose on said shaft and said shaft is free to rotate in said spring.

Dependencies are inferred from the claim text.