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Browse Prior Art Database

Alternating Pressure Ductor Roll

IP.com Disclosure Number: IPCOM000082539D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Holovka, C: AUTHOR

Abstract

This inking mechanism is applied to a printing machine without disturbing the operating design characteristics.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 65% of the total text.

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Alternating Pressure Ductor Roll

This inking mechanism is applied to a printing machine without disturbing the operating design characteristics.

The ductor roll 10 in the IBM System 3 card manufacturing machine ink unit is rotatably mounted in a yoke 12, which is free turning on an oscillating shaft 13. A pull-type taper pin 14 is used to fasten the shaft 13 to an oscillating drive arm 15 which is driven by an eccentric cam, not shown. A pawl, not shown, attached to the arm 15 is used to drive a ratchet mounted on the ink fountain roll shaft, not shown, to incrementally turn the roll 16.

With the yoke 12 in a vertical position, two rails 17,17 having counterbores are fastened on each side of the yoke 12 at equal distance from the horizontal center line of the oscillating shaft 13.

The oscillating shaft 13 is machined with two flats for mounting two counterbored shaft plates 18, with the shaft flats perpendicular to the vertical centerline of the arm 15. Four compression springs 19, of equal value are inserted into the counterbores between the rails 17, and shaft plates 18.

With the oscillating arm 15 in the vertical position the yoke 12 is also in the vertical position, due to the equal opposing pressure of the springs 19,19 on each side of the yoke. As the arm 15 and attached shaft 13 are rotated to the right, the yoke 12 will follow because the springs 19,19 on the left side are compressed and progressively exert greater force than the springs 19,19 on the righ...