JPH0275461U

JPH0275461U -

Info

Publication number: JPH0275461U
Application number: JP16082688U
Authority: JP
Priority date: 1988-07-06
Filing date: 1988-12-13
Publication date: 1990-06-08
Anticipated expiration: 2003-12-13
Also published as: JPH0750364Y2

Description

[Brief explanation of the drawing]

第１図ａ，ｃはコンピユータ用紙と、これに形
成された印字部の状況を説明し、第１図ｂは正常
な位置に画像が複写されたコピー紙を、第１図ｄ
は画像がずれて複写されたコピー紙をそれぞれ示
す説明図、第２図は複写機の一部と自動原稿送り
装置を示す断面図、第３図ａ，ｂはシート原稿の
排紙態様を示す説明図、第４図は自動原稿送り装
置の全体回路ブロツク図、第５図乃至第１５図は
ＣＦＦモード時のフローチヤート、第１６図は第
１のセンサによる検出パルスを示す図、第１７図
は切換手段の他の構成例を示すブロツク図、第１
８図は第１７図に示した構成に対応したタイミン
グチヤート、第１９図は給紙指令発生手段の一例
を示すブロツク図である。１…コンピユータ用紙、３…スプロケツト孔、
５…自動原稿送り装置、６…プラテン、１７…給
紙口、１８…原稿排出手段、３６…第１のセンサ
、３７…第２のセンサ、Ｍ２，Ｍ３…駆動モータ
。 Figures 1a and 1c illustrate computer paper and the printing area formed on it, Figure 1b shows copy paper with an image copied in the normal position, and Figure 1d
2 is an explanatory diagram showing copy paper on which the image has been copied out of alignment, FIG. 2 is a cross-sectional view showing a part of the copying machine and the automatic document feeder, and FIGS. 3 a and 3 b show the manner in which sheet originals are ejected. 4 is an overall circuit block diagram of the automatic document feeder, FIGS. 5 to 15 are flowcharts in CFF mode, FIG. 16 is a diagram showing pulses detected by the first sensor, and FIG. 17 1 is a block diagram showing another example of the configuration of the switching means.
FIG. 8 is a timing chart corresponding to the configuration shown in FIG. 17, and FIG. 19 is a block diagram showing an example of paper feed command generating means. 1... Computer paper, 3... Sprocket hole,
5... Automatic document feeder, 6... Platen, 17... Paper feed port, 18... Original discharge means, 36... First sensor, 37... Second sensor, M2, M3... Drive motor.

Claims

[Claims for Utility Model Registration] (1) An automatic document feeder for an image forming apparatus, which is equipped with a platen that supports a document in order to illuminate the document; a conveyance member provided facing the;
In an automatic document feeder having a paper feed port through which a computer paper document sent onto a platen passes, and a document discharge means for transporting the document sent out from the platen after illumination, the sprocket hole of the computer paper is detected. , a first sensor for controlling the conveyance and stopping of computer paper by the detection pulse, and a second sensor for detecting whether or not the computer paper is in a position where it can be detected by the first sensor. disposed on the upstream side of the platen in the conveying direction of the computer paper so that the computer paper is fed to a predetermined position on the platen after the second sensor no longer detects the computer paper;
An automatic document feeder comprising a control means for controlling conveyance and stopping of the paper. (2) An automatic document feeder for an image forming apparatus that is equipped with a platen that supports a document in order to illuminate the document, and a conveyor provided opposite to the platen to convey the document on the platen. parts and
A paper feed port through which computer paper originals are sent onto the platen, a document ejection means that transports the originals sent out from the platen after illumination, and a paper ejection command that generates a paper ejection command when the computer paper on the platen has been illuminated. an automatic document feeder comprising a drive motor that starts operating only in response to the paper ejection command and drives the conveyance member and the document ejection means to transport computer paper. (3) Claim characterized in that the paper feed port is provided separately from a paper feed means for feeding normal sheet originals to the platen, and no conveyance member is provided on the conveyance path from the paper feed port to the platen. The automatic document feeder according to item 1 or 2.