Other

Dahlgren USA, Inc.

Dahlgren International, Inc.

Questech Corporation

Dahlgren Manufacturing Company, Inc.

James E Taylor

Harold P Dahlgren

John W Gardiner

Dwight W Peters

Brian M Bargenquest

Richard W Carlson

Jamie E Koehler

William A Sullivan

Mark A DiRico

Donald R Selby

There is disclosed a liquid application system for the printing, copying, imaging, converting, and related industries, and more particularly a liquid applicator means for applying moisture and coatings to cut sheets using a system of rolls and controlling surfaces, speeds, pressures, and directions of rotation of same relative to successive sheets passing through the system. In the use of the method and apparatus herein described, the liquid applied to the sheet is supplied from a reservoir or other liquid supply source to the nip between a smooth, resilient surfaced metering roll and a smoothly finished hydrophilic transfer roll. An abundant supply of liquid is supplied at the nip between the rolls which is metered by pressure contact between the resilient surfaced metering roll and the transfer roll to an exactly controlled film which adheres to the surface of the transfer roll, which rotates into contact with a cut sheet to apply the liquid thereto. A backup roll serves to propel the sheet through a pressure nip formed between the transfer roll surface and the surface of the backup roll. Sheet guides and feed rolls carry the sheets to and away from the pressure nip.

Liquid applicator for cut sheets

In-line printing and coating method achieves high coat weights (e.g, over 0.7 lb./1,000 sq.ft.) characteristic of blister seal operations and/or high gloss and high scuff resistance requirements, substantially without deleterious slinging. A high volume of coating is applied to a substrate by a coating cylinder supporting a resilient coating transfer surface consisting of an array of laser engraved coating-carrying indentations having substantially equal volumes that are uniformly distributed. An impression surface is positioned adjacent to the coating cylinder, positioned to impress a substrate between the coating transfer surface and the impression surface. A supply roll has a surface for applying liquid coating to the resilient transfer surface. The supply roll surface and the resilient transfer surface are in pressure contact, and adjacent surfaces of the supply roll and the coating cylinder rotate in the same direction. A metering member contacts the supply roll, so the load on the supply roll is metered before it is imparted to the resilient transfer surface. Resilient polymer and rubber surfaces carrying high volumes of coating are also disclosed. The cylinder supporting the resilient transfer surface can be advantageously used in other applications, for instance a roll of a keyless inker of an offset printing unit in a printing press.

High volume, textured liquid transfer surface

An addition to a multi-color lithographic offset printing press comprising a self-contained coating unit moveable into and out of operative relationship with an impression cylinder on the press unit (e.g. the impression cylinder of the last press unit) without interrupting or disrupting printing taking place in this last stage. The coating unit includes a special blanket cylinder, a transfer cylinder and doctor or metering means to control the amount of coating material on the transfer cylinder. Inclined tracks are provided to guide the coating unit into and out of operative relationship with the impression cylinder of the last printing stage.

Retractable coater assembly including a coating blanket cylinder

An addition to a multi-color lithographic offset printing press comprising a self-contained coating unit moveable into and out of operative relationship with the last stage impression cylinder without interrupting or disrupting printing taking place in this last stage. The coating unit includes a special blanket cylinder, a transfer roller and doctor or metering means to control the amount of coating material on the transfer roller. Inclined tracks are provided to guide the coating unit into and out of operative relationship with the impression roller of the last printing stage.

An apparatus for applying silicone polymer coating to a web substrate comprising: a roll having a resilient surface; means to rotate the roll; a metering member comprising a hard, generally flat, elongated metallic strip having first and second polished edges with a relieved area therebetween to prevent engagement of the metering member with a metered film of liquid on the resilient roll surface except by the portion of the metering member lying between the first and second polished edges; means to urge the metering member into pressure indented relation with the resilient surface; and heat exchanger means adjacent the metering member to code the metering member adjacent the metering edge.

Coating method

A blade surfacing machine for precisely honing a pair of intersecting surfaces on an extruder blade. The working surface of a rotating honing stone is maintained in spring-biased contact with a precisely leveled guide surface to achieve linear uniformity of the blade. A workholder table is pivotable about a horizontal axis and may be pin locked at selectable angles to produce blades having a selective angle of intersection between the two honed surfaces.

Variable angle extruder blade surfacing machine

A method and apparatus to ink and dampen a lithographic printing plate including a dampening fluid removal device comprising a doctor blade positioned in pressure indented relation with a resilient inking roller to remove dampening fluid of low viscosity from the roller while leaving more viscous ink on the roller surface. The blade, therefore, is efficient to doctor dampening fluid while insufficient for printing ink.

Dampening fluid removal device

A method and apparatus for continuously using ink and dampening fluid in a printing system includes removing ink and dampening fluid from a form roller after the form roller engages the printing plate. Mixing of the removed ink and dampening fluid to form a substantially homogeneous printing liquid is accomplished by circulating the removed ink and dampening fluid to a reservoir where it is mixed with ink in the reservoir by an auxillary blender. The homogeneous mixture is further circulated to the center of a metering nip between two rollers and flows longitudinally of the rollers at a rate to prevent separation of the dampening fluid from the ink. Unused printing ink and dampening fluid is returned to the reservoir with the ink and dampening fluid removed from the form roller.

Ink removal, circulating and distributing system

An inker for a lithographic printing press in which ink and dampening fluid are applied to the printing plate by a resilient applicator roller. A resilient ink metering member having a flat metering surface is mounted on a support member which is movable to adjust the angle of intersection of the metering surface relative to a plane tangent to the roller surface. A doctor blade is mounted to remove dampening fluid from the roller surface and is actuated to an operative position upon actuation of the dampener to apply dampening fluid to the applicator roller.

Inking systems

A method and apparatus to ink and dampen a lithographic printing plate wherein one or more of four disclosed embodiments of a dampening fluid evaporator device directs a continuous stream of air or other drying fluid along the length of a single resilient inking form roller (22) to remove dampening fluid from the roller (22) while leaving substantially dry ink on the roller surface.

Dampening fluid evaporator and method

Coating apparatus

An object of the invention is to provide a method of metering to a printing plate (P). An applicator roller (312), which receives ink from a pick-up roller (310), is positioned in pressure indented relation with a metering roller (12). The surface speed of metering roller (12) is varied to meter the ink to roller apparatus which supplies the ink to printing plate (P).

Growing community of inventors

Dallas, TX, United States of America

James E Taylor