# US 12,182,645 B2 · Image forming apparatus capable of setting print start position for back side of recording paper sheet based on margin formed by reducing image for back side in size

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- Number: US 12,182,645 B2
- Document ID: US12182645B2
- Status: Granted
- Kind: B2
- Application number: 18/387,446
- Filed: 2023-11-06
- Published: 2024-05-16
- Granted: 2024-12-31
- Earliest claimed: 2022-11-14
- Assignees: KYOCERA Document Solutions Inc.
- Applicants: KYOCERA Document Solutions Inc.
- Inventors: Masaaki Nishihara
- Web page: https://patentgrep.com/patent/US12182645B2

## CPC

- G06K 15/1843: {Changing size or raster resolution}
- G03G 15/234: {by inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its second face, e.g. by using a duplex tray; Details of duplex trays or inverters}
- G03G 15/5095: {Matching the image with the size of the copy material, e.g. by calculating the magnification or selecting the adequate copy material size}
- H04N 1/393: Enlarging or reducing
- G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

An image forming apparatus includes an image forming device, a controller, and an image processor that creates a reduced-size image from an original-size image of back-side image data at a size reduction ratio according to a magnification ratio from a first shrunk state of a recording paper sheet with only a front-side image formed to a second shrunk state after formation of the front-side and back-side images so that the back-side and front-side images on the sheet match respective original sizes of front-side image data and back-side image data. The controller allows the image forming device to form the front-side image, sets, based on a margin formed by the size reduction, a print start position for a back side of the sheet where the front-side and back-side images on the sheet are locationally aligned, and then allows the image forming device to form the reduced-size image as the back-side image.

## Claims

### Claim 1

An image forming apparatus comprising:
an image forming device that performs duplexing by forming a front-side image on a front side of a recording paper sheet and forming a back-side image on a back side of the recording paper sheet; and
a control device that includes a processor and functions, through the processor executing a control program, as
(i) a controller that allows the image forming device to perform the duplexing based on front-side image data for front side and back-side image data for back side,
(ii) an image processor that creates a reduced-size image obtained by reducing an image represented by the back-side image data from an original size represented by the back-side image data at a ratio of size reduction predetermined according to a ratio of magnification from a first shrunk state of the recording paper sheet with the front-side image formed but the back-side image not yet formed to a second shrunk state of the recording paper sheet having both the front-side image and the back-side image formed thereon and larger in size than the first shrunk state so that respective sizes of the back-side image and the front-side image on the recording paper sheet are equal to respective original sizes indicated by the front-side image data and the back-side image data, and
(iii) an image corrector that performs a correction, on image data representing the reduced-size image, to allocate a margin formed by the size reduction of the image represented by the back-side image data to a trailing end side of the recording paper sheet in a direction of conveyance of the recording paper sheet without allocating the margin to a leading end side of the recording paper sheet in the direction of conveyance,
wherein the controller allows the image forming device to form an image represented by the front-side image data on the front side of the recording paper sheet and allows the image forming device to form the reduced-size image on the back side of the recording paper sheet according to the allocation of the margin.

### Claim 2 (depends on 1)

The image forming apparatus according to claim 1, wherein
the image corrector further performs a correction, on the image data representing the reduced-size image, to allocate, when a left end of the recording paper sheet is a predetermined print start position, the margin in the widthwise direction to a right end side of the recording paper sheet without allocating the margin to a left end side of the recording paper sheet, and to allocate, when a right end of the recording paper sheet is a predetermined print start position, the margin in the widthwise direction to the left end side of the recording paper sheet without allocating the margin to a right end side of the recording paper sheet.