Browse Prior Art Database

Ink Feed System

IP.com Disclosure Number: IPCOM000082939D
Original Publication Date: 1975-Mar-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 3 page(s) / 51K

Publishing Venue

IBM

Related People

Croll, RC: AUTHOR [+2]

Abstract

This ink feed system provides a uniform and controllable film of ink on a transfer roll. The ink is then transferred to a document via an elastomeric type plate.

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Ink Feed System

This ink feed system provides a uniform and controllable film of ink on a transfer roll. The ink is then transferred to a document via an elastomeric type plate.

The transfer roll 1 is preferably plated with chromium to provide a smooth, wear-resistant surface. This roll rotates at a predetermined speed in the direction indicated. The surface velocity of the roll is matched to the velocity of the document to be printed.

An elastomeric type plate 2 is mounted in a rotatable print sector which is driven by a suitable motor, not shown, and completes a print cycle of 180 degrees for each document printed. The sector is shown in the "home" position.

The ink roll 3 consists of a nylon hub with a layer of open celled polyurethane foam bonded to its circumference. The ink roll is driven by a motor, not shown, at a relatively low speed in the direction shown, The ink roll is retained on the drive shaft by a ball detent, not shown, and is operator replaceable.

The ink is contained in a container 4. The ink is metered from the reservoir to the ink roll 3 via a polyurethane foam wick. The ink bottle, which is operator replaceable, clips into a tray assembly 5. The tray assembly pivots about a mounting stud 6. The ink roll 3, ink roll drive motor, ink bottle 4, and tray assembly 5 all mount to a single plate, which is part of a four-bar linkage and allows the ink roll to move into and out of contact with the transfer roll 1.

A solenoid 7 is used to engage the ink feed mechanism when the unit is operational and metering of the ink to the transfer roll 1 is desired. To activate the ink feed mechanism, the solenoid 7 is energized, which causes the ink roll 3 to move into contact with both the transfer roll 1 and the ink bottle wick. The normal force between the ink roll and the transfer roll can be adjusted via the adjustment screw 8. The higher this normal force, the greater the ink film thickness on the transfer roll 1...