Sheet conveying apparatus

• US 4,900,003 A
• Filed: 11/04/1988
• Issued: 02/13/1990
• Est. Priority Date: 11/09/1987
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hashimoto, Kenichiro
• Primary Examiner(s): Skaggs, H. Grant
• Application Number:
  US07/267,098
• Time in Patent Office: 466 Days
• Field of Search: 271/114-118, 271/10
• US Class Current: 271/114
• CPC Class Codes: B65H 3/0669 Driving devices therefor
• CPC Class Codes: B65H 3/5223 Retainers of the pad-type, e.g. friction pads
• CPC Class Codes: G03G 15/6502 Supplying of sheet copy material; Cassettes therefor
• CPC Class Codes: G03G 15/6511 Feeding devices for picking up or separation of copy sheets
• CPC Class Codes: G03G 15/6594 characterised by the format or the thickness, e.g. endless forms
• CPC Class Codes: G03G 2215/004 Separation device
• CPC Class Codes: G03G 2215/00421 Discharging tray, e.g. devices stabilising the quality of the copy medium, postfixing-treatment, inverting, sorting
• CPC Class Codes: G03G 2215/00485 Thin

Abstract

A sheet conveying apparatus for conveying a sheet comprises a separation rotary member for separating a single sheet from a plurality of sheets and feeding the sheet, a supply rotary member for supplying the sheet toward the separation rotary member, driving means for generating a driving force to rotate the separation rotary member, intermission means for intermitting the transmission of the driving force from the driving means, operating means for shifting the supply rotary member between a supplying operation position and retracted position retracted from the supplying operation position, and driving force transmitting means for performing the transmission or interruption of the intermission means, in synchronism with the shift of the supply rotary member to the retracted position or to the supplying operation position by means of the operating means.

Claims

1. A sheet conveying apparatus for conveying a sheet comprising:

a separation rotary member for separating a single sheet from a plurality of sheets and feeding the sheet;

a supply rotary member for supplying the sheets toward said separation rotary member;

driving means for generating a driving force to rotate said separation rotary member;

intermission means for intermitting the transmission of the driving force from said driving means;

operating means for shifting said supply rotary member between a supplying operation position and retracted position retracted from said supplying operation position;

driving force transmitting means for performing the intermission of said intermission means, in synchronism with the shift of said supply rotary member between said supplying operation position and said retracted position by said operating means.

2. A sheet conveying apparatus comprising:

a rotatably supported rotary shaft;

a sheet conveying roller means attached to said rotary shaft for feeding a sheet;

driving means for driving said rotary shaft; and

clutch means for controlling so as to or not to transmit the driving force generated by said driving means to said rotary shaft or not,

wherein said clutch means includes a first engagement member provided at one end of said rotary shaft for slidable movement in an axial direction of said rotary shaft and for rotation together with said rotary shaft, a second engagement member which can be engage by said first engagement member and which is rotated around said rotary shaft by a rotational force from said driving means, a rocker member rotatably supported by said rotary shaft, rotation transmission means provided on a part of said rocker member, and transmission means for converting a rotating motion of said rocker member to a reciprocating motion of said first engagement member.

3. A sheet conveying apparatus as set forth in claim 2, wherein said rocker member is rocked by a cam.

4. A sheet conveying apparatus as set forth in claim 2, wherein a pick-up roller assembly constituted by a pick-up roller rotated in synchronism with said sheet feeding roller means and an arm member rotatably mounted on said rotary shaft for rotatably supporting said pick-up roller receives a rotational force from said rocker member.

5. An image recording apparatus for recording an image on a recording sheet, comprising

a separation rotary member for separating a single recording sheet from a plurality of recording sheets and feeding the recording sheet;

a supply rotary member for supplying the recording sheets toward said separation rotary member;

driving means for generating a driving force to rotate said separation rotary member;

intermission means for intermitting the transmission of the driving force from said driving means;

operating means for shifting said supply rotary member between a supplying operation position and retracted position retracted from said supplying operation position;

driving force transmitting means for performing the intermission of said intermission means, in synchronism with the shift of said supply rotary member between said supplying operation position and said retracted position by said operating means; and

a recording means for recording an image on said recording sheet.