Printing Research, Inc.

Demoore; Howard W.

James A Elliott

Howard W DeMoore

Howard C Secor

David Dean Douglas

Charles G Kelly

Bryan G Argenbright

The invention is a simple, inexpensive, wash-free integrated cover for a printing transfer cylinder (preferably, but not necessarily, in a Komori press), comprising a flexible jacket covering permanently attached to a cylinder base cover. The invention provides advantages over T-Y paper and non-tack film in that dampening solution, washing, and cleaning causes failure in both over time, whereas dampening solution is beneficial to the present invention as such is retained in the flexible jacket cover and helps to prevent ink buildup and marking. The flexible jacket covering is moveable relative to the cylinder base cover, thereby further reducing ink buildup and marking. The integrated cover is disposable, which reduces periodic maintenance and cleaning of the transfer cylinder coverings and provides for fresh, clean substrate support surfaces upon each new installation. The flexible jacket covering and cylinder base cover are integrated into a single, convenient unit, thereby speeding and simplifying installation.

Inexpensive, wash-free integrated cover for printing press transfer cylinders

A flexible jacket covering for a printing press transfer cylinder having a low density selvage for attaching one edge of the jacket to a hook and loop attachment strip on the transfer cylinder. The covering is cut from fabric woven on a shuttleless loom. The fabric has a reduced density selvage formed by reducing the density of warp threads in the selvage is no more than the warp thread density in the body of the covering fabric and preferably to about half the warp thread density in the body of the fabric.

Printing press cylinder flexible jacket covering

A multipart printing press cylinder. A pair of hubs have an inner bore for mounting on a press shaft. Each hub is made in two parts which may be positioned about the press shaft and attached to each other by, e.g. screws. Each hub has a profile section. A pair of partial shells each include a pair of cylinder frames having a profile matching a hub profile. Manually releasable latches are provided for holding each partial shell on the hubs when the partial shell profiles are mated with the hub profiles. The outer perimeter of each cylinder frame has a radius and contour defining the outer size and shape of a printing press cylinder. A surface material, e.g. sheet aluminum, is formed to fit the frame perimeters and are preferably attached under tension to the frames.

Printing press cylinder

Transfer cylinder

Spool for winding string and wire

A transfer or delivery cylinder for a sheet-fed rotary printing press having an endless chain conveyor carrying gripper bars and grippers and driven by a sprocket wheel concentrically mounted on a drive shaft for pulling freshly printed sheets from the impression cylinder onto the transfer or delivery cylinder for movement to a further processing station within the press, wherein the transfer or delivery cylinder is a right circular cylinder eccentrically mounted to the drive shaft so that upon initial engagement of the freshly printed sheet by the grippers, the leading edge of the cylinder is spaced below the sheet which is thereafter pulled smoothly and uniformly into contact tangentially with the sheet support surface of the transfer or delivery cylinder.

Growing community of inventors

Euless, TX, United States of America

James A Elliott