Browse Prior Art Database

Media Guiding

IP.com Disclosure Number: IPCOM000074571D
Original Publication Date: 1971-May-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Laenen, EG: AUTHOR [+3]

Abstract

Precise longitudinal tracking of a media 22 transported past transducer 10 is provided by using a new arrangement of fixed guides disposed on opposite sides of media-driving capstan 12. A feature of the present guiding system is guiding the media on both sides of capstan 12 and improving longitudinal tracking with respect to transducer 10. Using the described guiding system, guiding can be more accurate than the variations expected in the width of media. The arrangement not only provides for precise guiding, but also improves media wrap on capstan 12.

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Media Guiding

Precise longitudinal tracking of a media 22 transported past transducer 10 is provided by using a new arrangement of fixed guides disposed on opposite sides of media-driving capstan 12. A feature of the present guiding system is guiding the media on both sides of capstan 12 and improving longitudinal tracking with respect to transducer 10. Using the described guiding system, guiding can be more accurate than the variations expected in the width of media. The arrangement not only provides for precise guiding, but also improves media wrap on capstan 12.

A pair of vacuum columns are disposed on opposite sides of center wall 13. A pair of oppositely opening vacuum chambers 14 and 15 are disposed in center wall 13. Equal vacuum is applied through ports 16. Both vacuum chambers have a pair of air bearings 17 and 18 disposed, respectively, on upper and lower walls. As the media 22 is transported over vacuum chambers 14 and 15, a catenary is formed by the vacuum providing added dynamic stiffness to the media. Transducer 10 is movable into and out of chamber 14 for transducing engagement with media 22.

A pair of fixed longitudinal guides 19 and 20 are disposed on the opposite end portions of vacuum chambers 14 and 15. These guides are spaced slightly less than the media width--for example, 0.001 or 0.002 inch.

Another advantage of the guiding system is that the air bearings 17 and 18 are formed from cylindrical stock. The radius of curvature for all air bear...