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AN ARRANGEMENT FOR ENCODING THE IMPACT ENERGY FOR ASSOCIATED CHARACTERS IN A SERIAL PRINTER

IP.com Disclosure Number: IPCOM000023107D
Original Publication Date: 1976-Oct-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal

Abstract

This relates to controlling and varying the hammer strike force in a printer using a print wheel with characters supported by spokes radiating from a central hub. Due to the shape of some characters, it is desirable to strike these characters with more or less force than most of the other characters. To achieve this control, it is proposed that a code be placed along each of the spokes, the code controlling the force with which the character supported by that spoke is struck. When a character is properly positioned for printing, the code is read and decoded to drive the hammer with the correct energy. This would allow the hammer impact energy for each character of each font to be selected from the total range of possible energies from the printer and allow this selection to be made at the time of font design and to allow the encoder to be molded as an integral part of the print wheel. The encoder could be implemented by optical means, magnetic means, electrostatic means or a mechanical sensing arrangement.