JPH0635272A - Unread document discriminating device for automatic document feeder - Google Patents

Abstract

PURPOSE:To discriminate an unread document without soiling the surface of a document. CONSTITUTION:A stamp 14 is installed on a document feeding side in a reader 11. The stamp 14 is impregnated with ink fading away with the lapse of time. A solenoid 15 is linked with the stamp 14, and a photosensor 16 installed on an upstream side in a document feeding direction is electrically connected to the solenoid 15. When the photosensor 16 detects the trailing edge of the alreadyread document S fed along a guiding plate 13, the solenoid 15 is actuated and the stamp 14 puts a mark M showing that read is finished on the end of the surface of the document S, whereby the unread document is discriminated based on the presence or absence of the mark M.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a facsimile machine, an image scanner, a copying machine, a transfer machine, etc., to automatically feed a document to an image reading / copying / transferring apparatus. Can be applied to. More specifically, the present invention relates to an unread document discriminating apparatus which can discriminate an unread document by adding a read mark to a read document in such an automatic document feeder.

[0002]

2. Description of the Related Art Conventionally, an unread document discriminating apparatus used in, for example, a facsimile machine, etc., puts a read mark on the surface of a document when the document is read by the reading device. The unread original is discriminated depending on the presence / absence.

[0003]

However, the unread document discriminating apparatus described above has a problem that the surface of the document is contaminated because the surface of the document is marked with a read mark.

Therefore, an object of the present invention is to make it possible to determine an unread original without contaminating the surface of the original.

[0005]

Therefore, according to the first aspect of the invention, the unread original can be discriminated by attaching the read mark M to the read original S, as in the following illustrated embodiment. In the unread document discriminating apparatus 12 of the automatic document feeder 11, the read mark M is attached by using ink that disappears with the passage of time.

According to a second aspect of the present invention, for example, as in the following illustrated embodiment, an automatic document feeder 11 is provided which marks a read document S with a read mark M so that an unread document can be discriminated. In the unread document discriminating apparatus 12, the read mark M is provided by using an ink whose pigment is decomposed by light or heat.

According to a third aspect of the present invention, the unread original discriminating apparatus 12 of the automatic original feeding apparatus 11 according to the first or second aspect of the present invention, for example, as in the embodiments shown in FIGS. It is characterized in that the read mark M is provided in a line shape over the entire length of the read document S in the conveyance direction.

According to a fourth aspect of the present invention, the unread original discriminating apparatus 12 of the automatic original feeding apparatus 11 according to the first or second aspect of the present invention has been read as described above, for example, as in the following illustrated embodiment. The mark M is provided on the back surface of the read document S.

[0009]

In the present invention, after the unread original is discriminated by the read mark M, the ink of the read mark M disappears with the passage of time.

According to the second aspect of the present invention, after the unread original is discriminated by the read mark M, the pigment of the ink of the read mark M is decomposed by applying light or heat to remove the read mark M. Turn it off.

In the third aspect, the unread original is discriminated by the line-shaped read mark M.

Further, according to the fourth aspect, the unread original is discriminated by the read mark M on the back surface of the original.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a reading device having an unread document discriminating device 12 of an automatic document feeding device 11 according to an embodiment of the present invention.

The unread original discriminating device 12 has a window 13 on the original feeding side of the original conveying glass plate 13 in the reading device.
a is provided. A stamp 14 is provided below the window 13a. The stamp 14 forms a mark by a member having an impregnating property, and impregnates an ink that is colored when it is alkaline, such as an ink for map marker, or a volatile ink.

A solenoid 15 is connected to the stamp 14, and the stamp 14 can be freely retracted and retracted through the window 13a by the operation of the solenoid 15. Also, the solenoid 15 is
It is electrically connected to a photo sensor 17 provided between the reading scanner 16 and the stamp 14. On the other hand, a cradle 18 for the stamp 14 is provided on the upper side of the window 13a.

The automatic document feeder 11 includes a document placing table 19
The originals stacked on the paper are fed face-down one by one by the paper feed roller 20 between the reading scanner 16 and the driving roller 21, and the originals are read by the reading scanner 16 while being fed by the driving roller 20. read. Then, the read original S is sent out along the glass plate 13, and when the photo sensor 17 detects the rear end of the read original S, the solenoid 15 is activated and the stamp 14 moves as shown in FIG. ,
A read mark M is attached to the end of the front surface of the read document S. Therefore, the document without the read mark M is multi-fed, and the unread document is determined by the presence or absence of the read mark M.

After the discrimination, the ink of the read mark M is an acid sizing agent added to prevent bleeding when the paper of the read original is manufactured, in the case of the ink that develops color when it is alkaline as described above. Is gradually neutralized, and the read mark M disappears. If the scanned original is neutral paper, the sheet is slightly acidic, so
The alkalinity of the ink is neutralized with the lapse of a long time, and the read mark M also disappears. Further, in the case of volatile ink, it evaporates with the passage of time, and the read mark M disappears as well.

The ink to be impregnated in the stamp 14 may be a pigment of the ink which is decomposed by light or heat. Then, the ink of the read mark M is exposed to light and heat and the pigment is decomposed with time,
The read mark M gradually disappears.

In each of the above embodiments, the stamp 14 is used to put the read mark M on the surface of the read document S, but as shown in FIG. 3, the position of the stamp 14 of the embodiment shown in FIG. In place of the stamp 14 and the solenoid 15, a stamp roller 22 that contacts the surface of the read document S may be provided. An ink roller 24 for supplying ink to the roller 23 is provided as well as an encoder 23 for rotating in pressure contact with the stamp roller 22. Then, a tube 25 is arranged between the ink tank 24 and the encoder 23, and a nozzle 26 in contact with the surface of the encoder 23 is attached to the tip of the tube 25.

Then, the stamp roller 22 is rotated together with the read document S sent out by the driving roller 21, and the nozzle 26 of the tube 25 replenishes the ink from the ink tank 24 to the surface of the encoder 23. . Then, the ink linearly adheres to the peripheral surface of the stamp roller 22 by the rotation of the encoder 23, and adheres to the peripheral surface of the stamp roller 22. Then, the stamp roller 22 puts a linear read mark M on the surface of the read document S, as shown in FIG.

Further, in each of the above-mentioned embodiments, the read mark M is attached to the front surface of the read document S, but the read mark M is attached to the back surface of the read document S. You may In that case, when the documents are fed in a double-passed manner, the read completion mark M is not attached to the back surface of the read document S,
The read mark M is printed on the unread document that has been double-fed and unreadable.
Is attached. Therefore, when discriminating an unread original, when the original sent out from the reading scanner 16 is stacked with its front side facing up, the original directly below the original without the read completed mark M is not found. When the document is a read document and the documents are stacked with the front side facing down, it can be seen that the document just above the document without the read mark M is the unread document.

[0022]

As described above, according to the present invention, after the unread original is discriminated by the read stamp, the ink of the read stamp disappears with the lapse of time, so that the unread original can be printed without soiling the surface of the original. Can be determined.

According to the second aspect of the present invention, after the unread original is discriminated by the read stamp, the pigment is decomposed by applying light or heat, so that the read stamp disappears and the surface of the original is erased. The unread original can be discriminated without being contaminated.

According to the third aspect of the present invention, since the line-shaped read mark is used for discrimination, it is easy to discriminate an unread document even if the document is misaligned and double-fed, and the surface of the document becomes dirty. Can be determined without.

Further, according to the fourth aspect of the invention, since the determination is made by the read mark on the back surface of the original, it is possible to determine the unread original without temporarily soiling the front surface of the original.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a reading device including an unread document discriminating device of an automatic document feeding device according to an embodiment of the present invention.

FIG. 2 is a plan view of a read document with a read mark attached thereto.

FIG. 3 is a schematic configuration diagram of a reading device including an unread document discriminating device of an automatic document feeding device according to another embodiment of the present invention.

FIG. 4 is a plan view of a read document with a read mark.

[Explanation of symbols]

 11 Automatic Document Feeding Device 12 Unread Document Discriminating Device M Read Mark S S Read Document

Claims (4)

[Claims] 1. An unread original discriminating apparatus of an automatic original feeding apparatus, which marks a read original with a read stamp so that an unread original can be discriminated. An unread original discriminating apparatus for an automatic original feeding apparatus, which is attached by using it. 2. An unread original discriminating apparatus of an automatic original feeding apparatus, wherein an unread original is discriminated by attaching a read stamp to a read original, and the pigment decomposes the read stamp by light or heat. The unread original discriminating apparatus of the automatic original feeding apparatus, which is attached using the ink. 3. The unread document discriminating apparatus of the automatic document feeder according to claim 1, wherein the read mark is provided in a line shape over the entire length of the read document in the conveying direction. 4. The unread document discriminating apparatus of the automatic document feeder according to claim 1, wherein the read mark is provided on the back surface of the read document.