Original feeding apparatus

• US 4,667,951 A
• Filed: 06/30/1986
• Issued: 05/26/1987
• Est. Priority Date: 08/23/1983
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Tanaka, Mamoru, Honjo, Takeshi, Umeda, Yoshihito, Takahata, Naomi
• Primary Examiner(s): Schacher, Richard A.
• Application Number:
  US06/880,112
• Time in Patent Office: 330 Days
• Field of Search: 271/3.1, 271/902, 271/202, 271/225, 271/227, 271/258, 271/259, 271/251, 271/301, 271/304, 271/3.4, 271/275, 271/199, 271/265, 271/270, 271/197
• US Class Current: 271/259
• CPC Class Codes: G03B 27/6264 Arrangements for moving several originals one after the other to or through an exposure station
• CPC Class Codes: G03G 15/23 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
• CPC Class Codes: Y10S 271/902 Reverse direction of sheet movement

Abstract

An original feeding apparatus for single or both side original copy has belts and rollers to carry an original to an exposure position a glass platen, motors for driving the belts and rollers, an electromagnetic brake and a drive control circuit to apply electromagnetic and electric brake forces on the motors, and a μ-COM to control the operation of the apparatus. The original can be stopped at the exposure position with high position, and both side original copy can be automatically performed without requiring the user to rearrange the originals after the copy operation.

Claims

1. An original feeding apparatus comprising:

carrying means for carrying an original to a predetermined position;

drive means for driving said carrying means;

decelerating means for decelerating a drive speed of said driven means;

stop means for stopping an operation of said carrying means; and

control means for sequentially actuating said decelerating means and said stop means so that the original is stopped at the predetermined position, said control means being adapted to actuate said decelerating means so as to decelerate the drive speed of said driving means, and to actuate said stop means after a predetermined delay,

wherein said control means stops an operation of said decelerating means when the drive speed becomes smaller than a predetermined speed.

2. An apparatus according to claim 1, wherein said declerating means gradually decelerates the drive speed of said drive means by intermittently rotating said drive means in opposite directions.

3. An apparatus according to claim 1, wherein said control means has counting means for counting for a predetermined period of time from a predetermined timing, and said control means actuates said decelerating means at the predetermined timing and actuates said stop means when said counting means ends counting.

4. An apparatus according to claim 3, wherein said control means stops a drive operation of said drive means in a forward direction at the predetermined timing.

5. An apparatus according to claim 3, wherein said carrying means has detecting means for detecting the original placed at a predetermined position on an original carry path, and the predetermined timing is a timing at which said detecting means detects an edge of the original.

6. An apparatus according to claim 5, wherein the edge of the original is a trailing edge of the original.

7. An apparatus according to claim 1, wherein said stop means has an electromagnetic brake.

8. An original feeding apparatus comprising:

carrying means for carrying an original to a predetermined position;

drive means for driving said carrying means;

transmission means for transmitting the driving force of said drive means to said carrying means;

first stop means for applying an electrical brake on said drive means in the condition that the driving force is transmitted by said transmission means to said carrying means;

second stop means for stopping an operation of said carrying means; and

control means for simultaneously actuating both said first and second stop means in a predetermined timing after driving initiation of said drive means.

9. An apparatus according to claim 8, wherein said drive means has a motor, and said first stop means applies the electrical brake by short-circuiting two ends of said motor.

10. An apparatus according to claim 9, wherein said control means has counting means for counting a predetermined period of time so as to stop the original at the predetermined position, and the predetermined timing is an operation end timing of said counting means.

11. An apparatus according to claim 10, wherein said carrying means has detecting means for detecting the original at a predetermined position on an original carry path, and said control means starts said counting means when said detecting means detects an edge of the original.

12. An apparatus according to claim 11, wherein the edge of the original is a trailing edge of the original.

13. An apparatus according to claim 8, wherein said second stop means has an electromagnetic brake.

14. An apparatus according to claim 13, wherein said control means applies power over rating power to said electromagnetic brake to pulse drive said electromagnetic brake and then applies the rating power to said electromagnetic brake to continuously drive said electromagnetic brake when the original is to be stopped.

15. An apparatus according to claim 8, wherein said control means actuates said second stop means and then actuates said first stop means.

16. An original feeding apparatus comprising:

carrying means for carrying an original to a predetermined position;

drive means for driving said carrying means;

decelerating means for gradually decelerating a drive speed of said drive means by means of intermittently rotating said drive means in opposite directions;

stop means for stopping an operation of said carrying means; and

control means for sequentially actuating said decelerating means and said stop means so that the original is stopped at the predetermined position, said control means being adapted to actuate said decelerating means so as to decelerate the drive speed of said driving means, and to actuate said stop means after a predetermined delay.