# US 4,399,444 A · Heat-sensitive recording head

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- Number: US 4,399,444 A
- Document ID: US4399444A
- Status: Granted
- Kind: A
- Application number: 06/331,352
- Filed: 1981-12-16
- Granted: 1983-08-16
- Earliest claimed: 1980-12-19
- Assignees: Fuji Xerox Co., Ltd.
- Inventors: Haruhiko Moriguchi; Takashi Ohmori
- Web page: https://patentgrep.com/patent/US4399444A

## CPC

- G01D 15/10: Heated recording elements acting on heatsensitive layers
- B41J 2/345: characterised by the arrangement of resistors or conductors
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS

## Abstract

A thermal recording head is formed by alternately laminating conductive and insulating layers and then disposing a heat generating resistive element along a side surface of the laminated body in contact with each conducting layer and extending in a direction transverse to the planes of the laminating layers.

## Claims

### Claim 1

A thermal recording head of the type including at least one resistive element having first and second electrodes connected thereto for providing current through said resistive element to thereby generate heat, said recording head comprising conductive and insulating layers alternately laminated by a chemical vapor deposition process, or the like, to form a laminated body, said laminated body having a side surface extending in a direction not parallel to the planes of said layers; and said resistive element comprising a resistive material extending along said side surface and in contact with each of said conductive layers.

### Claim 2 (depends on 1)

A thermal recording head as claimed in claim 1, wherein said side surface extends at an oblique angle with respect to a line perpendicular to the planes of said layers.

### Claim 3 (depends on 1)

A thermal recording head as claimed in claim 1, wherein said side surface is perpendicular to said layers.

### Claim 4 (depends on 1)

A thermal recording head as claimed in claim 1, wherein said conductive layers are recessed from said side surface.

### Claim 5 (depends on 1)

A thermal recording head as claimed in claim 1, wherein said resistive material as it crosses each insulating layer has a substantially convex surface facing away from said laminated body.

### Claim 6

A thermal recording head of the type including at least one resistive element having first and second electrodes connected thereto for providing current through said resistive element to thereby generate heat, said recording head comprising a laminated body of alternately laminated and substantially planar insulating and conductive layers, said laminated body having a side surface extending at an oblique angle with respect to a line perpendicular to the planes of said layers, and a resistive material as said resistive element extending along said side surface and in contact with each of said conductive layers.

### Claim 7

A thermal recording head of the type including at least one resistive element having first and second electrodes connected thereto for providing current through said resistive element to thereby generate heat, said recording head comprising a laminated body formed of alternately laminated and substantially planar insulating and conductive layers, said laminated body having a side surface extending in a direction not parallel to the planes of said layers, said conductive layers being recessed from said side surface, and a resistive material as said resistive element extending along said side surface and in contact with each of said recessed conductive layers.

### Claim 8

A thermal recording head of the type including at least one resistive element having first and second electrodes connected thereto for providing current through said resistive element to thereby generate heat, said recording head comprising a laminated body formed of alternately laminated and substantially planar insulating and conductive layers, said laminated body having a side surface extending in a direction not parallel to the planes of said layers, and a resistive material as said resistive element extending along said side surface and in contact with each of said conductive layers, said resistive material as it crosses each said insulating layer extending further away from said side surface of said laminated body than in portions of said resistive material between said insulating layers, whereby said resistive material has a substantially convex surface facing away from said laminated body.