JPH0326142U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a schematic configuration diagram showing the main parts and their surroundings of a copying machine equipped with an automatic document feeder according to this invention, and Figure 2 is a schematic configuration diagram showing the entire automatic document feeder and copying machine in a simplified manner. 3 is a perspective view showing the original thickness measuring means 30 and its surroundings, FIG. 4 is a schematic configuration diagram showing the configuration of the laser displacement sensor, and FIG. 5 is a perspective view showing the eraser together with the photoreceptor drum and electric equipment. 6 is a block diagram showing a control device 50 that controls a copying machine equipped with an automatic document feeder and its related configuration, and FIG. 7 is a subroutine related to document feeding and edge erase control executed by the control device 50. FIG. 8 is a flowchart showing the judgment and processing executed by the control device of the embodiment corresponding to the copying machine equipped with the automatic document feeder according to claim 2.
The figure is a schematic configuration diagram illustrating a conventional copying machine equipped with an automatic document feeder. 10...copy machine, 11...contact glass,
12... Photosensitive drum, 13... Eraser, 20
...Automatic document feeder, 21...Document insertion slot, 2
2...Transport device, 23...Document abutting member, 2
4...Conveyance path, 30...Document thickness measuring means, 4
0...Paper feeding device, 43...Upper roller, 44...Lower roller, 50...Control device, D...Document, Dr...
...Manuscript edge, P...Transfer paper.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A conveyance path for conveying a document inserted through the document insertion slot onto the contact glass of a copying machine, and a conveyance path for conveying the document fed through the conveyance path onto the contact glass and then conveying it out. and a document abutment member, which is equipped with an automatic document feeder equipped with a conveyance device that can also reversely convey the document in the opposite direction to the conveyance direction, and is fixedly disposed on the conveyance upstream side of the contact glass; In a copying machine equipped with an eraser that erases a part of the charge on the photoreceptor to narrow the range of the image formed thereon, the original thickness is measured to measure the thickness of the original that passes through it on the conveyance path. In addition to providing a measuring means, the measured value of the measuring means is input, and if the input value is equal to or greater than a predetermined thickness, the document fed onto the contact glass is reversely conveyed by the conveying device. select the document abutment mode in which the edge of the document abuts against the document abutting member and stops the document, and if the thickness is less than a predetermined value, select the non-manual mode in which the document is stopped immediately after the trailing edge passes the document abutment member. An automatic original document, characterized in that it is provided with a control device that selects a document abutment mode and controls the erase amount of the image on the edge side of the document on the photoreceptor by the eraser to increase by a predetermined amount when in the mode. Copying machine equipped with a feeding device. 2. A transport path for transporting the original inserted from the original insertion slot onto the contact glass of the copying machine, and a transport path for transporting the original sent through the transport route onto the contact glass and then transporting it, as well as a transport path opposite to the transport direction. The automatic document feeder is equipped with a conveyance device capable of conveying the document in the opposite direction also in the reverse direction, a document abutting member fixedly disposed on the conveyance upstream side of the contact glass, and a paper feeder for feeding the transfer paper. In the copying machine, a document thickness measuring means for measuring the thickness of the document passing therethrough is provided on the conveyance path, and the measured value of the measuring means is inputted so that the input value reaches a predetermined predetermined value. If the thickness is greater than or equal to , select a document abutting mode in which the document fed onto the contact glass is reversely conveyed by the conveying device and the edge of the document is abutted against the document abutting member and stopped; If the thickness is less than a predetermined thickness, a non-document abutting mode is selected in which the document is stopped immediately after the trailing edge passes the document abutting member, and when in this mode, feeding of the transfer paper by the paper feeder is controlled. A copying machine equipped with an automatic document feeder, characterized in that it is provided with a control device that controls paper feeding timing to be delayed by a predetermined period of time.