# US 4,396,465 A · Method for making seamless metallic ribbon belts for tape cartridges

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- Number: US 4,396,465 A
- Document ID: US4396465A
- Status: Granted
- Kind: A
- Application number: 06/386,508
- Filed: 1982-06-09
- Granted: 1983-08-02
- Earliest claimed: 1980-06-24
- Assignees: Newell Research Corporation
- Inventors: Chester W. Newell
- Web page: https://patentgrep.com/patent/US4396465A

## CPC

- G11B 23/08778: {Driving features, e.g. belt}
- C25D 1/04: Wires; Strips; Foils
- 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)
- C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR

## Abstract

A method for making endless metallic ribbon drive belts for tape cartridges. Metal is electroformed on a steel ring sandwiched between two non-conductive discs. After removal from the steel ring, the plated ring is thinly coated with an elastomeric coating resulting in a compound belt having a low coefficient of elasticity in the base belt and a high coefficient of friction in the coating.

## Claims

### Claim 1

A method of making metallic endless ribbon belts for peripherally driven tape rolls comprising,
removably disposing a conductive belt between two solid insulating disks in contacting, parallel plane relation, thereby forming a sandwich structure,
contacting the inside diameter of said conductive belt with a current carrying wire member,
dipping said sandwich structure into metallic plating material, said metallic plating material having a stiffness in ribbon form greater than polyester,
electrically plating a layer of said metallic plating material onto said conductive belt by directing current through said current carrying wire member, through said conductive belt and through said metallic plating material,
removing said sandwich structure from the plating material and removing said conductive belt from the insulating disks, and
removing said layer of metallic plating material from said conductive belt.

### Claim 2 (depends on 1)

The method of claim 1 wherein the layer of metallic plating material is of nickel in a thickness between one and five microns.

### Claim 3 (depends on 1)

The method of claim 1 wherein the layer of metallic plating material is of copper in a thickness between two and ten microns.