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IMPROVED PRINTER HAMMER

IP.com Disclosure Number: IPCOM000023304D
Original Publication Date: 1977-Jun-30
Included in the Prior Art Database: 2004-Mar-29
Document File: 2 page(s) / 181K

Publishing Venue

Xerox Disclosure Journal

Abstract

A print hammer is provided to increase dwell time during im-pact printing. It consists of a hollow tube which is made from visco-elastic material. The hollow tube is filled with a Newtonian fluid over a wide temperature range with relative constant viscosity, such as a silicone oil. Also, inside the tube are several balls free to traverse the tube during hammer flight. The ends of the hammer are fitted with metal inserts to prevent abrasions. After the hammer hits a platen, ad-ditional impacts result from the balls hitting the front of the inside of the hammer, Viscosity of the fluid, the weight density of the balls, and the length of the tube control printing dynamics.

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XEROX DISCLOSURE JOURNAL

IMPROVED PRINTER HAMMER Proposed Classification
R.L. Jelfo U.S. Cl, 197/49
J,L. Mincer - mt. C1.B41j 1/32

A print hammer is provided to increase dwell time during im~
pact printing. It consists of a hollow tube which is made from
visco~elastic material. The hollow tube is filled with a
Newtonian fluid over a wide temperature range with relative
constant viscosity, such as a silicone oil. Also, inside the
tube are several balls free to traverse the tube during hammer
flight. The ends of the hammer are fitted with metal inserts
to prevent abrasions. After the hammer hits a platen, ad-
ditional impacts result from the balls hitting the front of
the inside of the hammer, Viscosity of the fluid, the weight
density of the balls, and the length of the tube control
printing dynamics.

Volume 2 Number 3 May/June 1977 25

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Page 2 of 2

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                 XEROX DISCLOSURE JOURNAL
26 Volume 2 Number 3 May/June 1977

[This page contains 1 picture or other non-text object]