JPS57125066A - Thermal print head - Google Patents

Thermal print head

Info

Publication number
JPS57125066A
JPS57125066A JP1134981A JP1134981A JPS57125066A JP S57125066 A JPS57125066 A JP S57125066A JP 1134981 A JP1134981 A JP 1134981A JP 1134981 A JP1134981 A JP 1134981A JP S57125066 A JPS57125066 A JP S57125066A
Authority
JP
Japan
Prior art keywords
resistance
layer
thermal print
printed
reaction
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
JP1134981A
Other languages
Japanese (ja)
Inventor
Takafumi Endo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1134981A priority Critical patent/JPS57125066A/en
Publication of JPS57125066A publication Critical patent/JPS57125066A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters 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
    • B41J2/32—Typewriters 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
    • B41J2/345—Typewriters 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 characterised by the arrangement of resistors or conductors

Abstract

PURPOSE:To provide an inexpensive thermal print head that makes trimming process unnecessary by forming with reaction glass a high resistance area required in a band shape resistance layer. CONSTITUTION:A lead is formed with an electricity conductive thick film of a specified pattern on an insulating substrate 1. In a specified area that opposes the lead 2 a thick film resistance material is printed, and it is heated at temperature over 900 deg.C to form a band shaped resistance layer 3. Next, after a reaction glass layer 6 is printed by the screen printing method at the position that corresponds to a trimming groove, the reaction between the reaction glass layer 6 and the resistance area 3 is made to develop in a furnace, the temperature of which is controlled at a specified temperature. Only the resistance of the band shaped resistance layer on which the reaction glass layer is printed becomes the high resistance portion, and the band shaped resistance layer is divided as in the conventional thermal print heads that have a trimming groove, so that the divisions correspond to the groups of leads, and one exothermic element respectively can be constituted by each division.
JP1134981A 1981-01-28 1981-01-28 Thermal print head Pending JPS57125066A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1134981A JPS57125066A (en) 1981-01-28 1981-01-28 Thermal print head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1134981A JPS57125066A (en) 1981-01-28 1981-01-28 Thermal print head

Publications (1)

Publication Number Publication Date
JPS57125066A true JPS57125066A (en) 1982-08-04

Family

ID=11775556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1134981A Pending JPS57125066A (en) 1981-01-28 1981-01-28 Thermal print head

Country Status (1)

Country Link
JP (1) JPS57125066A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454133A2 (en) * 1990-04-26 1991-10-30 Matsushita Electric Industrial Co., Ltd. Thermal print head trimming apparatus and method for trimming resistance of a thermal print head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454133A2 (en) * 1990-04-26 1991-10-30 Matsushita Electric Industrial Co., Ltd. Thermal print head trimming apparatus and method for trimming resistance of a thermal print head

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