# US 4,393,423 A · Endless loop tape magazine, and a recording and/or playback machine utilizing the magazine

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- Number: US 4,393,423 A
- Document ID: US4393423A
- Status: Granted
- Kind: A
- Application number: 06/262,311
- Filed: 1981-05-11
- Granted: 1983-07-12
- Earliest claimed: 1977-07-29
- Assignees: Minnesota Mining and Manufacturing Company
- Inventors: Alfred H. Moris
- Web page: https://patentgrep.com/patent/US4393423A

## CPC

- G11B 23/07: using a single reel or core
- G11B 15/1891: {the record carrier being endless}
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A magazine including a fixed hub having a central opening and an endless loop of tape. The tape is wrapped about the hub to form a coil and extends from the innermost wrap in the coil through a slot in the hub, across the central opening and then around one side surface of the coil to the outermost wrap of the coil. A tape drive mechanism, tape guides and a transducer of a recording and/or playback machine can be positioned in the central opening to pull tape through the slot from the inner wrap of the coil and accurately guide the tape along a path past the transducer.

## Claims

### Claim 1

In combination:
a magazine comprising:
a housing comprising a cylindrical hub having a central opening and a slot extending axially across the full width of the hub and communicating with said central opening, and first and second spaced opposed flanges extending radially outwardly from said hub; and
an endless length of strip material having a major portion wrapped about said hub between said flanges and a minor portion extending from the innermost wrap of the coil through said slot, partially across said central opening and around the side surface of the coil to the outermost wrap of the coil;
said flanges being spaced by a dimension exceeding the width of said strip material in the range of about 0.025 inch to about 0.05 inch to provide a space between the coil and the flanges, which space allows shifting of said coil axially along said hub;
a recording and/or playback machine comprising:
means defining a station for releasably receiving said magazine;
drive means having members within said central opening of the magazine received in said station and in driving engagement with said minor portion of said strip material for pulling said strip material through said slot from said innermost wrap with the edges of said strip material between said drive mechanism and said hub generally coplanar with the edges of said coil;
a transducer positioned within said central opening of the magazine received in said station and said strip material between said drive mechanism and the slot in said hub; and
means within said central opening of the magazine received in said station for guiding said strip material in a precise predetermined path along said transducer;
said means for defining a station being adapted to position said magazine so that the spacing between said flanges will afford axial shifting of said coil to align the edges of said coil with the edges of the strip material along said means for guiding to compensate for misalignment of said magazine with said means for receiving and dimensional irregularities in said magazine.

### Claim 2

A method for moving an endless loop of strip material in a magazine in precise alignment past a transducer in a recording and/or playback machine releasably receiving the magazine despite irregularities in the magazine or slight misalignment between the machine and the magazine, said method comprising the steps of:
providing in the magazine a hub having a central opening in which the transducer is positioned and having a slot extending axially across the full width of the hub and communicating with the central opening about which hub a major portion of the strip material is wrapped to form a coil with a minor portion of the strip material extending from the innermost wrap of the coil through the slot, across the central opening and then around the side surface of the coil to the outermost wrap of the coil;
pulling the strip material from the innermost wrap of the coil across the transducer with the edges of the strip material across the transducer generally coplanar with the edges of the coil;
guiding the strip material in a precise predetermined path across the transducer via guide means mounted on the machine; and
allowing the coil of strip material to shift axially of the hub to align the edges of the strip material in the coil with the edges of the strip material along the guide means.