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Browse Prior Art Database

Lateral Guiding of a Tape Loop

IP.com Disclosure Number: IPCOM000095047D
Original Publication Date: 1965-Aug-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Lipschutz, LD: AUTHOR

Abstract

The tape loop recirculating storage apparatus has a configuration which minimizes the edge wear of the tape loop. Magnetic tape loop 10 is rotated in the direction of the arrow by a capstan drive 12 located inside of a tape loop cavity, the walls 14 of which are partially shown. One problem encountered in a tape loop apparatus is edge wear as the tape is rotated in a cavity. Previous efforts to minimize the edge wear by more careful alignment, squareness of the capstan, squareness of the loop, etc.. have utilized a configuration in which the loop is confined between parallel plates and the capstan is a cylinder without any flanges.

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Lateral Guiding of a Tape Loop

The tape loop recirculating storage apparatus has a configuration which minimizes the edge wear of the tape loop. Magnetic tape loop 10 is rotated in the direction of the arrow by a capstan drive 12 located inside of a tape loop cavity, the walls 14 of which are partially shown. One problem encountered in a tape loop apparatus is edge wear as the tape is rotated in a cavity. Previous efforts to minimize the edge wear by more careful alignment, squareness of the capstan, squareness of the loop, etc.. have utilized a configuration in which the loop is confined between parallel plates and the capstan is a cylinder without any flanges.

In order to drive a tape over a recording head. a high-frictional contact is maintained between the tape and the drive capstan. Large axial forces. and hence high wear, result, Guiding the tape as it leaves capstan 12 causes an unstable situation. If the tape should start to wander off center, the guiding wall. not shown, of the cavity downstream from capstan 12 causes further wandering with severe edge wear and edge folding. Because it is an unstable condition, efforts to improve wandering by careful alignment of the walls are unsuccessful.

The aforementioned problems are solved by providing the apparatus walls 14 with a width d. This is greater than the width w of the tape over the entire cavity with the exception that the cavity is of narrow width d' for a section as the tape approaches capstan 12. The...