Browse Prior Art Database

Print Noise Reduction

IP.com Disclosure Number: IPCOM000085390D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Klein, WF: AUTHOR [+2]

Abstract

Impact presents only a part of the total noise generated during a complete print cycle. A significant portion of the remainder of the noise can be eliminated by using a cam to drive a print hammer.

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Print Noise Reduction

Impact presents only a part of the total noise generated during a complete print cycle. A significant portion of the remainder of the noise can be eliminated by using a cam to drive a print hammer.

Motor 1 is continously rotated and has a cam 2 attached to its shaft. A print hammer 4, spring biased in the position shown, is carried by U-shaped bracket 8. Bracket 8 is pivotable and is carried by shaft 9.

When hammer 4 is to be driven against a pedal 7 on print wheel 6 for printing against platen 5, magnet 3 is activated. This causes hammer 4 to be brought against cam 2 for picking up a low dwell on cam 2. As cam 2 continues to rotate, hammer 4 will then be driven against pedal 7. Following printing, and upon further rotation of cam 2, hammer 4 will be restored to its normal spring biased position by ramp 10.

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