Method and apparatus for feeding and conveying copying papers in a copying machine

• US 4,708,456 A
• Filed: 02/27/1987
• Issued: 11/24/1987
• Est. Priority Date: 02/18/1984
• Status: Expired due to Term

• Current Assignee: Mita Industrial Co., Ltd. (Kyocera Corporation)
• Original Assignee: Mita Industrial Co., Ltd. (Kyocera Corporation)
• Inventors: Shibata, Kiyoshi, Shigemura, Yutaka
• Primary Examiner(s): Grimley, Arthur T.
• Assistant Examiner(s): Warren, David S.
• Application Number:
  US07/020,206
• Time in Patent Office: 270 Days
• Field of Search: 355/3 SH, 355/14 SH, 271/227, 271/235, 271/245, 271/246
• US Class Current: 399/394
• CPC Class Codes: G03G 15/6529 Transporting G03G15/6555 takes precedence

Abstract

A copying paper is deflected at least twice in the conveying process thereof from a paper feeding means to a photoreceptor which is disposed in the lower reaches of the conveying direction, whereby the positional state of the top edge of the copying paper is corrected at least twice. Since the extent of each deflection of the copying paper can be reduced, a habit of creasing, which has been a bad influence upon the transferring process, is not inflicted on the copying paper. The correction of the position of the top of the copying paper can be accurately carried out, whereby a clear image can be formed on the appointed position of the copying paper.

Claims

1. A method of feeding and conveying and correcting a position of an edge of a copying paper for use in a copyng machine provided with at least two pairs of conveying rollers on a conveying passage of said copying paper prior to a transferring process of the copying machine, wherein a paper feeding means and the conveying rollers are driven synchronously with the driving of an optical system of the copying machine so that the position of the top edge of the copying paper is to be at least twice corrected by making the top edge of the copying paper contact the at least two pair of conveying rollers so as to cause the copying paper to make at least two deflections, wherein the copying paper is once deflected while being conveyed by the paper feeding means and one of the at least two pairs of conveying rollers and is deflected a second time while being conveyed by two of the at least two pairs of conveying rollers;

wherein the first deflection is effected by operating the paper feeding means for a period of time when one of the at least two pair of conveying rollers is stopped and the second deflection is effected by operating one of the at least two pair of conveying rollers for a period of time when another of the at least two pair of conveying rollers is stopped.

2. A method of feeding and conveying and correcting a position of an edge of a copying paper for use in a copying machine as set forth in claim 1, wherein the copying paper is deflected by contacting the pair of conveying rollers most near the transferring position and the pair of conveying rollers disposed directly before the pair conveying rollers most near the transferring position, respectively.

3. An apparatus for feeding and conveying a copying paper for use in a copying machine provided with at least two pairs of conveying rollers on a conveying passage prior to a transferring process of said apparatus, wherein a copying paper detector for detecting a copying paper fed from a paper feeding means is provided somewhat upstream from said pairs of conveying rollers of an upper reach side for providing a first deflection of said copying paper, said pair of conveying rollers of said upper reach side being disposed in the upper reaches of the conveying direction, the top of said copying paper contacting said pair of conveying rollers of said upper reach side by means of said paper feeding means and said pair conveying rollers of said upper reach side on the basis of a signal from said copying paper detector so as to provide a first certain definite deflection to said copying paper, whereby the position of the top of said copying paper is once corrected, and wherein a second certain definite deflection is provided to said copying paper when the top of said copying paper is brought into contact with said pair of conveying rollers of a lower reach side nearest the transferring position, whereby the positional state of the top of said copying paper is again corrected, and wherein said pair of conveying rollers of said lower reach side are driven synchronously with the drive of an optical system of said apparatus for exposing manuscript;

wherein said first certain deflection is effected by operating said paper feeding means for a period of time when one of said at least two pair of conveying rollers is stopped and said second certain deflection is effected by operating one of said at least two pair of conveying rollers for a period of time when another of said at least two pair of conveying rollers is stopped.