Browse Prior Art Database

Recording Head for Magnetic Printing

IP.com Disclosure Number: IPCOM000063694D
Original Publication Date: 1985-Apr-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Yarmchuk, EJ [+details]

Abstract

A simple comb-like structure of magnetic material for a transverse recording head array for magnetic printing (Fig. 1) [1] reduces head power dissipation and is wired in a matrix multiplexed fashion (Fig. 2). The word windings, in writing one line of pels (picture elements), are pulsed sequentially (W1, W2, . . . , W42) where the pulse duty cycle of a given word winding is at most 1/42 (1/N for N word windings). The digit windings, however, are pulsed in parallel during each of the 42 word pulses, in accordance with the pattern to be printed. Thus, for roughly equal word and digit pulse durations the duty cycle of a digit winding can be significantly more than that of the word windings. The word windings are only about one fortieth as long as the digit windings and are less narrow.