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Browse Prior Art Database

VARIABLE HAMMER DELAY

IP.com Disclosure Number: IPCOM000023891D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 386K

Publishing Venue

Xerox Disclosure Journal

Abstract

A concept is disclosed regarding means for decreasing the length of the delay between succeeding print-hammer cycles of an impact-type printer. The standard practice is to use one delay time set to encompass the delay time of the print-hammer cycle time for the lowest hammer energy level of the various energy levels used during printing.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

VARIABLE HAMMER DELAY

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Proposed Classification
U.S. Cl. 1Ol/93C Int, C. B41j

N/9

FIG. I

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A concept is disclosed regarding means for decreasing the length of the delay between succeeding print-hammer cycles of an impact-type printer.

The standard practice is to use one delay time set to encompass the delay time of the print-hammer cycle time for the lowest hammer energy level of the various energy levels used during printing.

The present concept discloses the provision of different magnitudes of delays for the delay time of the print-hammer cycle time for the different print-hammer energy levels used during printing. This concept provides for shorter delays between the printing with higher energy levels and will improve the speed of printing.

FIG. 2

Volume 4 Number 2 March/April 1979

157

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Page 2 of 2

VARIABLE HAMMER DELAY (Cont'd)

With reference to Figure 1, various excursions of the print hammer are plotted with position versus time, Plot 10 depicts the print hammer excursion for the highest energy level used for printing with plot 13 depicting that for the lowest energy level. Plots 11 and 12 depict various intermediate energy levels used during printing.

Figure 2 depicts the period of delay between the times for energizing the hammer drive and the print element drive for the printing of succeeding characters according to the standard practice. Start time 18 depicts the initiation of a print- hammer cycle. Time 15 indicates...