Browse Prior Art Database

Low Cost Reel To Reel Tape Transport

IP.com Disclosure Number: IPCOM000077111D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Beach, LR: AUTHOR [+2]

Abstract

In reel-to-reel tape transports, either differential mechanisms or electronics accommodate varying radii of the reels in effecting a constant-tape speed past transducing station TS. An extremely low-cost reel-to-reel tape transport can be provided for a relatively short length of tape, by accommodating radii differences by media differential storage apparatus 10 (MDSA). MDSA 10 is designed to accommodate a length of media or tape 12 for accommodating radii differences between removable reel 13 (RR) and machine reel 14 (MR). When the amount of media 12 on reel 13 equals the amount on resl 14, a maximum length of media is in MDSA 10.

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Low Cost Reel To Reel Tape Transport

In reel-to-reel tape transports, either differential mechanisms or electronics accommodate varying radii of the reels in effecting a constant-tape speed past transducing station TS. An extremely low-cost reel-to-reel tape transport can be provided for a relatively short length of tape, by accommodating radii differences by media differential storage apparatus 10 (MDSA). MDSA 10 is designed to accommodate a length of media or tape 12 for accommodating radii differences between removable reel 13 (RR) and machine reel 14 (MR). When the amount of media 12 on reel 13 equals the amount on resl 14, a maximum length of media is in MDSA 10.

The mode of operation is as follows. RR 13 is loaded onto the tape transport. The free end of the media is threaded over MDSA 10 through TS to MR 14. Media 12 depends into vacuum column 15 of MDSA 10 to just below sensing element 16. Blower 25 provides a constant vacuum into column lS to provide a constant tension in transducing station TS. After media 12 is affixed to vacuum capstan or reel MR 14, tape transport is effected by motor 17 directly driving MR 14 and driving RR 13 via a belt/pulley arrangement 18. Both reels 13 and 14 travel at the same rotational velocity. As media 12 unwinds from RR 13 onto MR 14, the larger radii of media 12 on RR 13 displace media into vacuum column 15 as indicated by dotted lines 20. When the amount of media on MR 14 equals the media on RR 13, media 12 has its greatest excursi...