JPH0321075U

JPH0321075U -

Info

Publication number: JPH0321075U
Application number: JP8100789U
Authority: JP
Priority date: 1989-07-10
Filing date: 1989-07-10
Publication date: 1991-03-01
Anticipated expiration: 2004-07-10
Also published as: JPH083427Y2

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を複写機全体との
関連で示す正面図、第２図は１枚目の用紙のセツ
トバツク状態を示す説明図、第３図は２枚目の用
紙の受け入れ状態を示す説明図、第４図は２枚目
の用紙のスイツチバツク状態を示す説明図、第５
図は２枚目の用紙のセツトバツク状態を示す説明
図、第６図は３枚目の用紙のスイツチバツク状態
を示す説明図、第７図は３枚目の用紙のセツトバ
ツク状態を示す説明図、第８図は従来の複写機の
両面コピー用再給紙装置を例示する正面図、第９
図及び第１０図はそのそれぞれ異なる作動状態を
示す説明図である。１……レジストローラ対、２……感光体ドラム
、３……ベルト転写装置、４……定着装置、５…
…分岐ゲート、６……排紙ローラ対、７……排紙
トレイ、８……分岐通路、１０……センサ、１１
……第１の反転ローラ対、１２……第２の反転ロ
ーラ対、１３……切換ゲート爪、１４……第１の
再給紙ローラ対、１５……第２の再給紙ローラ対
、１６……第３の再給紙ローラ対、１７……第４
の再給紙ローラ対、１８……再給紙路。 Figure 1 is a front view showing one embodiment of this invention in relation to the entire copying machine, Figure 2 is an explanatory diagram showing the setting back state of the first sheet of paper, and Figure 3 is the reception of the second sheet of paper. Figure 4 is an explanatory diagram showing the state of the switchback of the second sheet of paper.
6 is an explanatory diagram showing the setback state of the second sheet of paper, FIG. 6 is an explanatory diagram showing the switchback state of the third sheet of paper, FIG. 7 is an explanatory diagram showing the setback state of the third sheet of paper, Figure 8 is a front view illustrating a paper refeeding device for double-sided copying of a conventional copying machine;
Figures 1 and 10 are explanatory diagrams showing different operating states. DESCRIPTION OF SYMBOLS 1... Registration roller pair, 2... Photosensitive drum, 3... Belt transfer device, 4... Fixing device, 5...
... Branch gate, 6 ... Paper discharge roller pair, 7 ... Paper discharge tray, 8 ... Branch passage, 10 ... Sensor, 11
...First reversing roller pair, 12... Second reversing roller pair, 13... Switching gate pawl, 14... First paper refeeding roller pair, 15... Second paper refeeding roller pair, 16...Third paper refeed roller pair, 17...Fourth
re-feeding roller pair, 18... re-feeding path.

Claims

[Claims for Utility Model Registration] 1. A sheet of paper copied on the first side is placed in a re-feeding path where the paper is branched downstream of the fixing device and enters in front of the pair of registration rollers, and its leading edge in the conveying direction is sequentially shifted by a predetermined amount. In a double-sided copy paper refeeding device for a copying machine, which loads sheets one by one and copies them onto the second side, a sensor detects branched paper, and a sensor detects the paper detected by the sensor. a pair of reversing rollers that transport the paper a predetermined distance in accordance with its length in the transport direction to the branch path and then reverse and switch back; a switching gate pawl that guides the paper switched back by the reversing roller body to the re-feeding path; A re-feeding roller pair is provided for transporting the paper guided to the re-feeding path by the switching gate pawl in both forward and reverse directions, and the preceding paper is transported by the re-feeding roller pair in the direction of the registration roller pair, A paper refeeding device for double-sided copying of a copying machine, characterized in that, when a sheet of paper leaves a predetermined distance from a pair of reversing rollers, a subsequent sheet enters the pair of reversing rollers toward said pair of reversing rollers. 2. The paper refeeding device for double-sided copying of a copying machine according to claim 1, wherein the branch passage downstream of the fixing device is provided in a vertical direction.