JPS6418136A - Overhead projector - Google Patents

Overhead projector

Info

Publication number
JPS6418136A
JPS6418136A JP17379487A JP17379487A JPS6418136A JP S6418136 A JPS6418136 A JP S6418136A JP 17379487 A JP17379487 A JP 17379487A JP 17379487 A JP17379487 A JP 17379487A JP S6418136 A JPS6418136 A JP S6418136A
Authority
JP
Japan
Prior art keywords
temperature
film
range
erasure
heater
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
JP17379487A
Other languages
Japanese (ja)
Inventor
Yasuhiko Saka
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP17379487A priority Critical patent/JPS6418136A/en
Publication of JPS6418136A publication Critical patent/JPS6418136A/en
Pending legal-status Critical Current

Links

Landscapes

  • Overhead Projectors And Projection Screens (AREA)

Abstract

PURPOSE:To securely raise the temperature of a film to a transparency temperature range and prevent the temperature from exceeding the range, and to erase an image by providing a circuit means which set the set temperature of a heater for erasure differently in film feeding operation and stopping operation, and setting the temperature in the feeding operation higher than that in the stopping operation. CONSTITUTION:The set temperature of the heater 6 for erasure is switched by using a motor driving indication signal from an operation switch 5 which indicates the start and stop of a motor 3 for feeding the film. The temperature of the heater for erasure is set properly and differently in the film feeding operation and stopping operation (set temperature in feeding operation > set temperature in stopping operation) and the set temperature is switched and controlled according to whether the film is fed or stopped. Consequently, the temperature of the film securely enters the transparency range and is prevented from exceeding the range, and the image can be erased.
JP17379487A 1987-07-14 1987-07-14 Overhead projector Pending JPS6418136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17379487A JPS6418136A (en) 1987-07-14 1987-07-14 Overhead projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17379487A JPS6418136A (en) 1987-07-14 1987-07-14 Overhead projector

Publications (1)

Publication Number Publication Date
JPS6418136A true JPS6418136A (en) 1989-01-20

Family

ID=15967277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17379487A Pending JPS6418136A (en) 1987-07-14 1987-07-14 Overhead projector

Country Status (1)

Country Link
JP (1) JPS6418136A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006274075A (en) * 2005-03-29 2006-10-12 Jfe Steel Kk Method for repairing wall of coke oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006274075A (en) * 2005-03-29 2006-10-12 Jfe Steel Kk Method for repairing wall of coke oven

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