Browse Prior Art Database

Pressure Pad for Magnetic Heads

IP.com Disclosure Number: IPCOM000095524D
Original Publication Date: 1964-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Bond, MF: AUTHOR

Abstract

Pressure pad 10 not only causes document 15 to wrap about magnetic head 20, but also varies the amount of wrap depending upon whether or not there are any bumps or grooves in document 15. This permits the gap of head 20 to read data residing on the bump or groove.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Pressure Pad for Magnetic Heads

Pressure pad 10 not only causes document 15 to wrap about magnetic head 20, but also varies the amount of wrap depending upon whether or not there are any bumps or grooves in document 15. This permits the gap of head 20 to read data residing on the bump or groove.

Pad. 10 includes notched block 11 which is spring-biased so as to cause documents 15 to wrap about head 20. The notch in block 11 provides three localized pressure points 25, 26 and 27. The location and pressure at these points varies depending upon whether or not there are any mutilations in the document. Stainless steel tape 12 functions to force document 15 against the gap in head 20 and also prevents creasing or mutilation of document 15 by member 11.

With the document moving from left to right, a crease 30 causes the left side of block 1 1 to tilt downwardly while the right side is forced upwardly. Such action increases the amount of wrap and pressure on the document and brings the valley of the crease into intimate contact with head 20 at its gap. As the crest of the crease passes the gap of head 20, block 1 1 moves so that the right side tilts downwardly and the left side is forced upwardly to provide greater wrap and pressure on the document. The other valley of the crease is thus brought into intimate contact with the gap of head 20.

1

Page 2 of 2

2

[This page contains 3 pictures or other non-text objects]