Camera using a film with a magnetic memory portion with a two-speed film transporting feature

• US 5,245,372 A
• Filed: 03/13/1992
• Issued: 09/14/1993
• Est. Priority Date: 03/14/1991
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Aoshima, Chikara
• Primary Examiner(s): Gellner, Michael L.
• Assistant Examiner(s): BLANKENSHIP, HOWARD BENNETT
• Application Number:
  US07/850,836
• Time in Patent Office: 550 Days
• Field of Search: 354/105, 354/106, 354/212, 354/173.1, 354/173.11, 360/88, 360/90
• US Class Current: 396/319
• CPC Class Codes: G03B 17/24 with means for separately producing marks on the film, e.g. title, time of exposure
• CPC Class Codes: G03B 2217/244 Magnetic devices

Abstract

A camera uses a film with a magnetic memory portion and includes a film transporting circuit for transporting the film, a magnetic operation circuit for writing or reading information to or from the magnetic memory portion of the film during the film transporting operation by means of the film transporting circuit and control circuit for controlling the film transporting circuit in such a manner that a film transporting speed at the time information is written by the magnetic operation circuit is slower than a film transporting speed at the time the information is read by the magnetic circuit.

Claims

1. A camera using a film with a magnetic memory portion;

comprising;

(a) film transporting means for transporting the film;

(b) magnetic operation means for writing or reading information to or from said magnetic memory portion of said film during the film transporting operation of said film transporting means; and

(c) control means for controlling said film transporting means in such a manner that a film transporting speed at the time the information is written by said magnetic operation means is slower than a film transporting speed at the time the information is read by said magnetic operation means.

2. A camera according to claim 1, wherein said magnetic operation means comprises a magnetic head.

3. A camera according to claim 1, wherein said control means comprises means for controlling said film transporting means in such a manner that the film transporting speed is increased when a film blank transporting operation is performed.

4. A camera according to claim 1, wherein said control means comprises means for controlling said film transporting means in such a manner that the film transporting speed is decreased when a one-frame winding-up operation is performed.

5. A camera according to claim 1, wherein said control means comprises means for controlling said film transporting means in such a manner that the film transporting speed is decreased when a one-frame rewinding operation is performed.

6. A camera according to claim 1 wherein said control means comprises means for controlling said film transporting means by means of changing a current supplied to said film transporting means.

7. A camera according to claim 1, wherein said control means comprises means for controlling said film transporting means by means of changing a voltage supplied to said film transporting means.

8. A camera according to claim 1, wherein said film transporting means comprises a gear transmission train, and said control means comprises means for changing a rotation direction of said gear transmission train.

9. A camera according to claim 1, wherein said film transporting means comprises a gear transmission train, and said control means comprises means for changing a gear ratio of said gear transmission train.

10. A film transporting apparatus for a camera using a film with a magnetic memory portion;

comprising;

(a) film transporting means for transporting the film;

(b) magnetic operation means for writing or reading information to or from said magnetic memory portion of said film during the film transporting operation by means of said film transporting means; and

(c) control means for controlling said film transporting means in such a manner that a film transporting speed at the time the information is written by said magnetic operation means is slower than a film transporting speed at the time the information is read by said magnetic operation means

11. An apparatus according to claim 10, wherein said magnetic operation means comprises a magnetic head.

12. An apparatus according to claim 10, wherein said control means comprises means for controlling said film transporting means in such a manner that the film transporting speed is increased when a film blank transporting operation is performed.

13. An apparatus according to claim 10, wherein said control means comprises means for controlling said film transporting means in such a manner that the film transporting speed is decreased when a one-frame film winding-up operation is performed.

14. An apparatus according to claim 10, wherein said control means comprises means or controlling said film transporting means in such a manner that the film transporting speed is decreased when a one-frame film rewinding operation is performed.

15. An apparatus according to claim 10 wherein said control means comprises means for controlling said film transporting means by means of changing a feed mode of said film transporting means.

16. An apparatus according to claim 10, wherein said control means comprises means for controlling said film transporting means by means of changing a voltage of said film transporting means.

17. An apparatus according to claim 10, wherein said film transporting means comprises a gear transmission train, and said control means comprises means for changing a rotation direction of said gear transmission train.

18. An apparatus according to claim 10, wherein said film transporting means comprises a gear transmission train, and said control means comprises means for changing a gear ratio of said gear transmission train.