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Reading And Writing Using Single Read And Write Heads

IP.com Disclosure Number: IPCOM000098381D
Original Publication Date: 1960-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Cole, JM: AUTHOR

Abstract

The apparatus prints code indicia on a document in rows of non-overlapping diagonal columns so that the columns may be sensed in series by bit and the rows in series by column by a single sensing head.

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Reading And Writing Using Single Read And Write Heads

The apparatus prints code indicia on a document in rows of non-overlapping diagonal columns so that the columns may be sensed in series by bit and the rows in series by column by a single sensing head.

The apparatus employs a rotatable drum bearing a plurality of magnetizable helical areas on its surface. Also used are a single magnetic write head, document feeding, inking, and drum erasing and cleaning means. As a helical area E on the drum passes under the write head a timed sequence of code impulses causes the head to magnetize certain short segments of the helix. These segments are developed at the inking station by a dry ferromagnetic ink. Then they contact a document at point H and the ink adhering to them is impressed upon this document forming a slanted column of magnetic spots F.

Because of the slanted character of each column, individual bits within a column are sensed seriatim, as are the individual columns within a row. This feature eliminates the need for multiple sensing heads when the sensing of a single row of columns, or characters, is considered.

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