JP-7855920-B2 - Image forming system and program

JP7855920B2JP 7855920 B2JP7855920 B2JP 7855920B2JP-7855920-B2

Inventors

笹見慎吾

Assignees

コニカミノルタ株式会社

Dates

Publication Date: 20260511
Application Date: 20220517

Claims (12)

A paper transport unit that transports continuous paper according to the paper transport path, An image forming unit that forms an image on the continuous paper, An image reading unit is located downstream of the image forming unit in the paper transport path and reads the image formed on the continuous paper to generate image data. The system includes a control unit that determines whether or not there is an image defect based on the image data read, and determines whether or not to reprint the image that was determined to have an image defect based on the result of the determination, The control unit continues the operation of the image forming unit until it determines that it does not want to reprint the image . The control unit, when it determines that there is an image defect, places the image to be reprinted at a position after the final image formed by normal printing, and if the interval between the image to be reprinted and the image formed before the reprinting cannot maintain a predetermined image interval for normal printing, the image forming system forms the image to be reprinted by leaving an integer multiple image interval, which is an integer multiple of the predetermined image interval and the smallest image interval that allows for reprinting, from the image formed before the reprinting .
The image forming unit comprises an image forming unit body that forms an image on the continuous paper, The image forming system according to claim 1, further comprising a fixing unit for fixing the formed image onto the continuous paper.
The image forming system according to claim 1, wherein the control unit continues to transport the continuous paper to the paper transport unit under the same transport conditions during image formation until it determines that reprinting is not necessary.
The image forming system according to claim 3, wherein the transport conditions include at least one of the transport speed and the pressure contact state.
The image forming system according to claim 1, wherein the control unit determines whether or not there is an image defect based on whether or not the read image data contains a defective image.
The image forming system according to claim 5, wherein the control unit determines that the read image data contains defective images and decides to perform the reprint.
The image forming system according to claim 1, wherein the control unit determines whether or not there is an image defect based on the presence or absence of image formation defects in the read image data.
The processing unit is located upstream of the image reading unit in the paper transport path. The image forming system according to any one of claims 1 to 7 , wherein the control unit determines whether or not there is an image defect based on whether or not there is a processing defect by the processing unit in the read image data.
The image forming system according to claim 8 , wherein the control unit continues the processing of the processing unit until it determines that it is not necessary to reprint.
The image forming system according to claim 1, wherein the control unit does not perform image adjustment processing that may cause changes in image quality until it determines that reprinting is not necessary.
The image forming system according to claim 10 , wherein the image adjustment process includes at least one of image density adjustment, color resist adjustment, and formation of a discard band.
A paper transport unit that transports continuous paper according to the paper transport path, An image forming unit that forms an image on the continuous paper, A computer for an image forming system, which includes an image reading unit located downstream of the image forming unit in the paper transport path, and which reads the image formed on the continuous paper and generates image data, Based on the image data read, the control unit determines whether or not there is an image defect, and based on the result of that determination, it decides whether or not to reprint the image that was determined to have an image defect. The control unit continues the operation of the image forming unit until it determines that it does not want to reprint the image . The control unit, when it determines that there is an image defect, places the image to be reprinted after the final image formed by normal printing, and if the interval between the image to be reprinted and the image formed before the reprint cannot maintain a predetermined image interval for normal printing, the program forms the image to be reprinted by leaving an integer multiple image interval, which is an integer multiple of the predetermined image interval and the smallest image interval that allows for reprinting, from the image formed before the reprint .

Description

This invention relates to an image forming system and program. Conventionally, image forming apparatuses that form images on continuous paper are known. For example, an image forming apparatus is known that facilitates the correction of the unfolded object (output) by inspecting the image after the first printing (normal printing) and cutting on the continuous paper, and reprinting the image containing defects in the image or cutting at the end of the continuous paper (see Patent Document 1). On the other hand, to prevent deterioration of materials such as the photoreceptor and developer, it is common practice to immediately stop the image forming unit as soon as the image forming process for the final image of a printed image is completed. For example, a (color) image forming apparatus is known that immediately separates the photoreceptor drum, which acts as the image forming unit, from the intermediate transfer belt and stops it as soon as the image forming process for the final image is completed (see Patent Documents 2 and 3). Japanese Patent Publication No. 2020-44789Japanese Patent Publication No. 2004-4398Japanese Patent Publication No. 2007-79570 This is a schematic diagram of an image forming system according to an embodiment of the present invention.This is a block diagram showing the functional configuration of an image forming system.This is a flowchart showing the image formation process.This is a flowchart showing the image formation process, a continuation of Figure 3.(a) is a diagram showing an example of image formation on continuous paper when there are no image defects in normal printing. (b) is a diagram showing an example of image formation on continuous paper when there are image defects on multiple pages, which are common in normal printing.(a) is a diagram showing an example of image formation on continuous paper when there are several pages with few image defects other than near the last page in normal printing. (b) is a diagram showing an example of image formation on continuous paper when there are image defects only on the last page in normal printing.(a) is a diagram illustrating an example of image formation on continuous paper when there are image defects on a small number of pages, including the last page, during normal printing. (b) is a diagram illustrating an example of image formation on continuous paper when there are image defects on a small number of pages, including the last page, during normal printing, and when the reprint of the last page also has image defects. Embodiments of the present invention will be described in detail with reference to the attached drawings. Note that the present invention is not limited to the illustrated examples. First, the apparatus configuration of this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram of the image forming system 1 of this embodiment. Figure 2 is a block diagram showing the functional configuration of the image forming system 1. As shown in Figure 1, the image forming system 1 of this embodiment comprises a paper feeder 10, a processing device 20, a paper adjustment device 30, an image forming device 40, a processing device 50, an image inspection device 60, and a winding device 70. In the image forming system 1, the paper transport path for continuous paper P is in the following order from upstream to downstream: paper feeder 10, processing device 20, paper adjustment device 30, image forming device 40, processing device 50, image inspection device 60, and winding device 70. The paper feeder 10 is a device that feeds continuous paper P to the downstream side of the paper transport path, such as to the image forming apparatus 40. Inside the housing of the paper feeder 10, for example, as shown in Figure 1, a roll of continuous paper P is wound around a support shaft 11 and held rotatably. The paper feeder 10 transports the continuous paper P wound around the support shaft 11 to the processing apparatus 20 at a constant speed, passing through a transport path that involves multiple transport rollers, being exposed on the top surface of the device, and then re-entering the device's interior. The exposed portion of the continuous paper P in the paper feeder 10 is used as space for cutting the continuous paper P with a cutter and connecting it to a new roll of paper. The paper feeding unit 12 (Figure 2) comprises the support shaft 11 of the paper feeding device 10, the transport rollers for the continuous paper P inside the housing, and the motor and other drive components. While the continuous paper P in the paper feeding device 10 is configured to be in roll form, it is not limited to this configuration; other forms of continuous paper, such as folded paper, may also be used. Furthermore, the continuous paper P is not limited to paper and may include media such as film. Here, the paper transport section T1 is defined as the continuous paper P transport portion of the image fo