Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2002-07-29
2004-02-03
Tran, Hoan (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S072000
Reexamination Certificate
active
06687471
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an image forming apparatus, and particularly to an image forming apparatus by which a toner image corresponding to an image data of a fixed form size is formed on a recording sheet whose size is larger than the fixed form size, and outputted.
The image forming apparatus by which a toner image corresponding to an image data of a fixed form size is formed on a recording sheet (wide sheet) whose size is larger than the fixed form size, and outputted, exists. In this connection, in this case, it is presupposed that, in the wide sheet in which the image is formed in an area of the fixed form size, an unnecessary margin portion is cut, and the sheet is made the fixed form size on which the image is formed.
In the case of the image formation on the wide sheet, even when a stamp function or overlay function are combinedly used, in the area of the fixed form size, the stamp image or overlay image is formed. That is, it is in a condition that, because there is no necessity until now, the function to form the image in the margin portion of the wide sheet is not provided, and no image is formed in the margin portion.
For the recording sheet outputted by the image formation, a check called double feeding check is necessary. In the case of the double feeding check, it is necessary that the recording sheets are turned over manually one by one sheet carefully, and the existence or not of the image is checked. Or, it is necessary that the double feeding detection sensor is provided in the image forming apparatus in order not to use a hand, resulting in cost up of the apparatus.
Further, not only the double feeding check, when a plurality of copies of the image formation is conducted by making a plurality of pages or chapters as unit, the same problem is also generated for the check of the image of each page, each chapter, or each copy.
In this connection, in order to make clear the image of the each page, each chapter or each copy, a classifying apparatus which is called finisher is mounted onto the image forming apparatus. In this finisher, in order to classify the each page, each chapter or each copy, it is coped with the problem in such a manner that a delivery position of the recording sheet is changed, or the recording sheet is shifted for each delivery. However, even when the classification is thus made, when the margin portion of the wide sheet is cut, it is necessary that the classified recording sheets are completed again, and it is troublesome.
Further, in order to detect that the desired density is stably formed on the image, a patch image is formed on the photoreceptor surface and the patch image is detected by a sensor. However in this method, because the density is detected by the patch image on the photoreceptor before the transfer, not on the recording sheet on which actually the image is formed, it has a problem that there is a case where it becomes the detection result different from the actual result.
SUMMARY OF THE INVENTION
To overcome the abovementioned drawbacks in conventional image forming apparatus, it is an object of the present invention to provide an image forming apparatus by which each kind of check can be conducted by using a margin portion of the recording sheet which is finally cut, when a toner image corresponding to the fixed form size image data is formed on a recording sheet whose size is larger than the fixed form size, and outputted.
Accordingly, to overcome the cited shortcomings, the abovementioned object of the present invention can be attained by image forming apparatus described as follow.
(1) An apparatus for forming a toner image on a recording medium, a size of which is larger than that of the toner image being a fixed form size, based on image data corresponding to the fixed form size, the apparatus comprising: an image-forming section to form the toner image in a region of the fixed form size, based on the image data corresponding to the fixed form size, and to form a specific toner image in a specific region outside the fixed form size, both the region and the specific region being shared each other within a whole area of the recording medium; and a controlling section to control the image-forming section so as to form a predetermined patch image, serving as the specific toner image, in the specific region outside the fixed form size.
(2) The apparatus of item
1
, wherein the controlling section controls the image-forming section so that a whole area of the predetermined patch image is contained within the specific region of the recording medium and so that the predetermined patch image is formed at a same position of each of a plurality of recording mediums, each of which is the recording medium.
(3) The apparatus of item
1
, wherein the apparatus also has a duplex image forming capability for forming an obverse image and a reverse image on both sides of the recording medium; and wherein the controlling section controls the image-forming section so that an image-forming region of the obverse image coincides with that of the reverse image on both sides of the recording medium in order to cutout the specific region outside the fixed form size at three positions including a top position, a bottom position and a longitudinal position.
(4) The apparatus of item
1
, further comprising: a density detecting sensor to detect a density of the predetermined patch image; wherein the controlling section controls a density of toner employed for a developing operation, a developing bias voltage and/or a charged voltage employed for a transferring operation, in response to the density of the predetermined patch image detected by the density detecting sensor.
(5) The apparatus of item
1
, further comprising: an operational command inputting device to input an operational command for setting a position of the predetermined patch image; wherein the controlling section controls the image-forming section so that the predetermined patch image is formed at the position, determined by the operational command inputted from the operational command inputting device, located within the specific region, serving as a margin space of the recording medium.
(6) The apparatus of item
5
, wherein the apparatus also has a duplex image forming capability for forming an obverse image and a reverse image on an obverse side and a reverse side of the recording medium, respectively; and wherein the controlling section controls the image-forming section so that the predetermined patch image is independently formed on each of the obverse side and the reverse side of the recording medium.
(7) The apparatus of item
1
, further comprising: an operational command inputting device to input a first operational command for initially setting a position of the predetermined patch image and a second operational command for finely adjusting the position of the predetermined patch image thereafter; and a display device to display a position setting diagram for finely adjusting the position of the predetermined patch image; wherein the controlling section controls the image-forming section and the display device so that the position setting diagram for finely adjusting the position of the predetermined patch image is displayed on the display device after forming the predetermined patch image at a first position initially determined by the first operational command inputted from the operational command inputting device, and then, the predetermined patch image is formed at a second position finely adjusted by the second operational command inputted from the operational command inputting device based on contents of the position setting diagram.
(8) The apparatus of item
1
, wherein, when the apparatus forms toner images on a plurality of recording mediums, which include a plurality of chapters and each of which is the recording medium, the controlling section controls the image-forming section so that the predetermined patch image is formed at a same position on each of recording mediums, which are included in the plurality of record
Kato Kenji
Okamoto Akira
Sakata Satoshi
Yamane Hideo
Konica Corporation
Squire Sanders & Dempsey
Tran Hoan
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