# US 4,397,911 A · Cleaning tape

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- Number: US 4,397,911 A
- Document ID: US4397911A
- Status: Granted
- Kind: A
- Application number: 06/276,746
- Filed: 1981-06-24
- Granted: 1983-08-09
- Earliest claimed: 1980-06-24
- Assignees: Fuji Photo Film Co., Ltd.
- Inventors: Goro Akashi; Masaaki Fujiyama
- Web page: https://patentgrep.com/patent/US4397911A

## CPC

- G11B 23/50: Reconditioning of record carriers; Cleaning of record carriers {; Carrying-off electrostatic charges}(G11B3/58 takes precedence)
- G11B 5/41: Cleaning of heads {(of record carriers G11B23/50)}
- Y10S 428/90: Magnetic feature
- Y10T 428/25: Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T 428/254: Polymeric or resinous material
- Y10T 428/256: Heavy metal or aluminum or compound thereof
- Y10T 428/257: Iron oxide or aluminum oxide
- Y10T 428/258: Alkali metal or alkaline earth metal or compound thereof
- Y10T 428/259: Silicic material
- Y10T 428/266: of base or substrate
- Y10T 428/31786: Of polyester [e.g., alkyd, etc.]
- Y10T 428/31797: Next to addition polymer from unsaturated monomers
- 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)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Cleaning tape having a cleaning layer formed on one or both sides of a base is disclosed. Said cleaning layer is composed of (1) a binder, (2) an organic polymer powder whose particle size is 3.mu. or more, and (3) an inorganic solid powder whose particle size is 3.mu. or less.

## Claims

### Claim 1

A cleaning tape, comprising:
a base; and
a cleaning layer on said base, said cleaning layer comprised of (1) a binder, (2) an organic polymer powder having a particle size of at least 3 microns, and (3) an inorganic solid powder having a particle size of no more than 3 microns, wherein the weight ratio of the organic polymer powder to the inorganic solid powder is from 1:10 to 10:1, wherein said base has a thickness of up to 25 microns, wherein said cleaning tape is an audio or video tape recorder cleaning tape.

### Claim 2 (depends on 1)

A cleaning tape as claimed in claim 1, wherein said ratio is from 1:5 to 10:3.

### Claim 3 (depends on 1)

A cleaning tape as claimed in claim 1, wherein said inorganic solid powder is selected from the group consisting of SiC, Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3, TiO.sub.2, ZnO, garnet and talc.

### Claim 4 (depends on 1)

A cleaning tape as claimed in claim 1, wherein said inorganic solid powder has a particle size of from 0.03 to 3 microns.

### Claim 5 (depends on 4)

A cleaning tape as claimed in claim 4, wherein said inorganic solid powder has a particle size of from 0.1 to 1 micron.

### Claim 6 (depends on 1)

A cleaning tape as claimed in claim 1, wherein said base is from 5 to 25 microns thick.

### Claim 7 (depends on 6)

A cleaning tape as claimed in claim 6, wherein said base is from 10 to 20 microns thick.

### Claim 8 (depends on 1)

A cleaning tape as claimed in claim 1, wherein said organic polymer is selected from the group consisting of cellulose, polyethylene, polyamide and polyester.

### Claim 9 (depends on 8)

A cleaning tape as claimed in claim 8, wherein said organic polymer has a particle size of between 3 and 20.mu..

### Claim 10 (depends on 1)

A cleaning tape as claimed in claim 1, wherein said cleaning tape is a video tape recorder cleaning tape.