Browse Prior Art Database

Antistick Transducer

IP.com Disclosure Number: IPCOM000091081D
Original Publication Date: 1969-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Aweida, JI: AUTHOR [+2]

Abstract

The operating surface of this magnetic transducer is arranged to reduce the tendency of magnetic recording tape to stick to the operating surface when it is stopped. The sticking tendency makes it difficult to properly accelerate the tape from rest, particularly where a single drive capstan is used and the tape is to be moved in a direction in which the capstan must push it past the transducer.

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Antistick Transducer

The operating surface of this magnetic transducer is arranged to reduce the tendency of magnetic recording tape to stick to the operating surface when it is stopped. The sticking tendency makes it difficult to properly accelerate the tape from rest, particularly where a single drive capstan is used and the tape is to be moved in a direction in which the capstan must push it past the transducer.

The tape stick tendency is reduced by greatly reducing the surface area of the transducer operating surface available for contact with the tape. The drawing shows a transducer assembly of the type described in "Vacuum Controlled Transducer," IBM Technical Disclosure Bulletin, Vol. 10, pp. 1231 and 1232. The operating surface of the transducer includes central surface 1 smoothly joined with angled leading and trailing surfaces 2 and 3 to allow a magnetic tape, not shown, to be guided over the transducer with a positive angle of wrap. Vacuum slots 6 and 7 and the several grooves 8 and 9 all participate in establishing and controlling proper head-to-tape separation during tape motion, as described in the article.

When tape motion stops, the tape contacts the operating surface and it tends to adhere to it, making restart difficult. This difficulty is eliminated by large depressions 10 and 11 formed in surface portions 2 and 3. These depressions reduce the surface area where adhesion can occur and drastically reduce the sticking force, making it easy for th...