Photocopying – Projection printing and copying cameras – Photographing on both sides of photo-sensitive paper
Reexamination Certificate
2000-04-10
2001-12-25
Adams, Russell (Department: 2851)
Photocopying
Projection printing and copying cameras
Photographing on both sides of photo-sensitive paper
C355S024000, C399S364000, C399S401000
Reexamination Certificate
active
06333774
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates a method and a system for printing a pair of images on opposite sides of a sheet of recording material on the basis of electronic signal, wherein the recording material is to be put in a paper supply section of a printer by hand to print the image on either side of the sheet. The present invention relates more particularly to a method and a system for preventing the images from being misplaced or misprinted on the sheet.
2. Background Arts
It is well-known to print a pair of images on opposite sides of a sheet of recording paper by feeding the recording sheet twice to a printer. That is, after printing one image on one side of the recording paper, the recording paper is fed to the printer in a reversed or inverted posture for printing the other image on the other side of the recording paper. Some conventional printers are provided with mechanisms for automatically turning over the recording paper to reverse the printing side, called a convertible perfector type. But such a mechanism inevitably enlarges the printer, complicates the printer's construction and results in raising the cost of the printer.
On the other hand, where the printer does not have the automatic paper reversing mechanism, the recording paper having a first image printed on one side thereof has to be manually placed in a paper supply section of the printer again, but in a reversed posture for printing a second image on the other side. If the operator places the recording paper in a wrong posture at that time, the second image would be printed in a wrong direction, e.g. in the upside down posture. If the operator fails to turn over the recording paper, the second image would be printed on the same side as the first image (double-printing).
In order to prevent double-printing, it is known to provide a sensor for checking whether there is any image on the side to print now. However, this solution cannot prevent the second image from being printed in the wrong direction.
It has also been suggested to display an illustration instructing the correct posture of the recording paper after an image is printed on one side of the recording paper. However, if the operator neglects or overlooks the illustration, misplacement of the recording paper or misprinting of the second image cannot be prevented.
SUMMARY OF THE INVENTION
In view of the foregoing, an object of the present invention is to provide a printing method and a printing system for printing a pair of images on both sides of a recording sheet through a printer that does not have an automatic paper reversing mechanism, whereby the pair of images are prevented from being printed in a wrong direction relative to each other.
Another object of the present invention is to provide a printing method and a printing system for printing a pair of images on both sides of a recording sheet, which presents mismatching the paired images.
According to the present invention, a printing method for printing first and second images on opposite sides of a recording sheet by manually setting the recording sheet twice in a printer comprises the steps of printing the first image on a first side of a recording sheet; providing indicia on the recording sheet to indicate the direction of the first image on the recording sheet, before printing the second image on a back side of the recording sheet from the first side; detecting the indicia from the recording sheet after the recording sheet is set in the printer for printing the second image on the back side; judging based on the detected indicia whether the recording sheet is set in a proper posture or not; printing the second image on the back side when the recording sheet is in the proper posture; and giving a warning without printing any image when the recording sheet is in a wrong posture.
According to a preferred embodiment wherein the printer prints images based on electronic image data, it is judged based on the detected indicia whether the back side of the recording sheet is oriented for printing or not, as well as whether the recording sheet is in a designated direction for printing the second image in a proper direction with respect to the first image. If the back side is not oriented for printing, a warning is given, and the printer is stopped from printing. When the back side is oriented for printing, the second image on the back side. However, if the recording sheet is not in the designated direction, the image data of the second image is processed to turn the direction of the second image relative to the recording sheet so as to print the second image in the proper direction. In that case, it is preferable to calculate an offset amount for canceling any deviation of the turned image from a predetermined printing position for the second image, so the second image is printed in the predetermined printing position.
To prevent mismatching the images on opposite sides of a recording sheet, the printing method according to the present invention, further comprises the steps of allocating an identification code to image data of each image to print; inputting data of correlation between the identification code of the first image and the identification code of the second image; providing the identification code of the first image on the recording sheet along with the first image, before printing the second image on the back side; detecting the identification code from the recording sheet when the recording sheet is set in the printer for printing the second image on the back side; checking based on the correlation data if the detected identification code correlates with the identification code of the second image; giving a warning without printing the second image when these two identification codes do not correlate with each other.
According to the present invention, a printing system for printing first and second images on opposite sides of a recording sheet by manually setting the recording sheet twice in a printer, comprises a printing device included in the printer, for printing an image on one side of a recording sheet based on electronic image data; an indicia providing device for providing indicia on the recording sheet to indicate the direction of the first image on the recording sheet, before printing the second image on a back side of the recording sheet from the first side; a detection device for detecting the indicia from the recording sheet after the recording sheet is set in the printer for printing the second image on the back side; a control device for judging based on the detected indicia whether the recording sheet is set in a proper posture or not, and causing the printing device to print the second image on the back side when the recording sheet is in the proper posture.
In an embodiment, when the recording sheet is in a wrong posture, the control device stops the printing device from printing the second image and outputs a warning signal to a warning device to make a warning.
In another embodiment, the printing system further comprises a device for processing the image data of the second image to turn the direction of the second image relative to the recording sheet if the recording sheet is not in a designated direction but the back side is oriented for printing, and calculating an offset amount for canceling deviation of the turned image from a predetermined printing position for the second image, so the second image is printed in the predetermined printing position in a proper direction with respect to the first image, wherein the control device stops the printing device from printing the second image when the back side of the recording sheet is not oriented for printing.
These and other objects and advantages of the present invention and features of the present invention will become apparent from the following detailed description of the preferred embodiments when taken in conjunction with the accompanying drawings, wherein like reference numerals designate like or corresponding parts throughout the several views. The dra
Fukushi Kazuhito
Ito Atsushi
Adams Russell
Fuji Photo Film Co. , Ltd.
Kim Peter B.
Sughrue & Mion, PLLC
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