JPS63151466A - Line type thermal head - Google Patents

Line type thermal head

Info

Publication number
JPS63151466A
JPS63151466A JP30030686A JP30030686A JPS63151466A JP S63151466 A JPS63151466 A JP S63151466A JP 30030686 A JP30030686 A JP 30030686A JP 30030686 A JP30030686 A JP 30030686A JP S63151466 A JPS63151466 A JP S63151466A
Authority
JP
Japan
Prior art keywords
layer
heat radiation
radiation plate
thermal head
coefficient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP30030686A
Other languages
Japanese (ja)
Inventor
Mitsuhiko Fukuda
Original Assignee
Rohm Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rohm Co Ltd filed Critical Rohm Co Ltd
Priority to JP30030686A priority Critical patent/JPS63151466A/en
Publication of JPS63151466A publication Critical patent/JPS63151466A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads

Abstract

PURPOSE:To provide a thermal head reduced in thickness while holding sufficient strength, by a method wherein a heat radiation plate is formed of a ferrous material having high bending rigidity and a protective cover is formed into a laminated structure consisting of an upper layer part made of a ferrous material having coefficient of linear expansion equal to or less than that of the heat radiation plate and a lower layer part made of a light metal material. CONSTITUTION:A thermal head has such a sandwich structure that a heat radiation plate 1 and the upper layer part 2a of a protective cover 2 both of which are almost equal in coefficient of linear expansion holds the lower layer part 2b of the protective cover 2 different from both of them in coefficient of linear expansion therebetween. Therefore, even when the lower layer part 2b of the protective cover 2 shows different coefficient of linear expansion with respect to the heat radiation plate 1 and the upper layer part 2a by the temp. change of a thermal head due to the heat of a heat generating resistor 3, since the heat radiation plate 1 and the upper layer part 2a holding the lower layer part 2b therebetween show equal coefficient of linear expansion, no warpage is generated in the thermal head. Since the heat radiation plate 1 is formed of a structural rolled steel material having high strength, even when the heat radiation plate 1 is thinly formed, thermal head does no become unstable from the aspect of strength and can be reduced in thickness.
JP30030686A 1986-12-16 1986-12-16 Line type thermal head Pending JPS63151466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30030686A JPS63151466A (en) 1986-12-16 1986-12-16 Line type thermal head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30030686A JPS63151466A (en) 1986-12-16 1986-12-16 Line type thermal head

Publications (1)

Publication Number Publication Date
JPS63151466A true JPS63151466A (en) 1988-06-24

Family

ID=17883188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30030686A Pending JPS63151466A (en) 1986-12-16 1986-12-16 Line type thermal head

Country Status (1)

Country Link
JP (1) JPS63151466A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6478859A (en) * 1987-09-21 1989-03-24 Kyocera Corp Thermal head
DE3940545A1 (en) * 1988-12-08 1990-06-13 Rohm Co Ltd THERMAL PRINT HEAD
US4963886A (en) * 1989-05-01 1990-10-16 Rohm Co., Ltd. Thermal printing head
JPH03101635U (en) * 1990-02-06 1991-10-23
DE4042448C2 (en) * 1989-05-01 1997-05-28 Rohm Co Ltd Thermal printing head esp. for facsimile machine
US10603934B2 (en) 2016-10-19 2020-03-31 Seiko Epson Corporation Winding apparatus and printing apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6478859A (en) * 1987-09-21 1989-03-24 Kyocera Corp Thermal head
DE3940545A1 (en) * 1988-12-08 1990-06-13 Rohm Co Ltd THERMAL PRINT HEAD
US4972205A (en) * 1988-12-08 1990-11-20 Rohm Co., Ltd. Thermal printing head
US4963886A (en) * 1989-05-01 1990-10-16 Rohm Co., Ltd. Thermal printing head
DE4042448C2 (en) * 1989-05-01 1997-05-28 Rohm Co Ltd Thermal printing head esp. for facsimile machine
DE4042449C2 (en) * 1989-05-01 1997-05-28 Rohm Co Ltd Thermal print head
JPH03101635U (en) * 1990-02-06 1991-10-23
US10603934B2 (en) 2016-10-19 2020-03-31 Seiko Epson Corporation Winding apparatus and printing apparatus

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