Printing – Stenciling – Stencils
Reexamination Certificate
2001-01-18
2004-02-03
Yan, Ren (Department: 2854)
Printing
Stenciling
Stencils
C101S129000
Reexamination Certificate
active
06684768
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stencil printing machine and a stencil printing method for perforating and printing by using stencil sheet. Particularly, the present invention relates to a stencil printing machine and a stencil printing method capable of providing excellent printed image even in printing a large number of sheets.
2. Description of the Related Art
FIG. 10
is a block diagram showing an outline constitution of a stencil printing machine.
As shown by
FIG. 10
, a stencil printing machine
50
is generally constituted by an operation panel section
51
having operation keys and a display, an image reading section
52
such as an image scanner, a control section (CPU)
53
, an image processing section
54
, an image perforating section
55
for thermally perforating original document image to stencil sheet and a printing section
56
for printing by using stencil sheet formed with perforated image.
According to the stencil printing machine
50
, there is carried out a control of operation of perforating and printing stencil sheet based on instruction of the control section
53
based on operation input from the operation panel section
51
.
Further explaining, according to the stencil printing machine
50
, when there is an input instructing start of stencil making operation from the operation panel section
51
provided at the main body, the image reading section
52
reads an image of a set original document. In parallel with the operation of reading the original document, the original document image is subjected to a processing of converting the original document image into binary data (perforating data) which is used for perforating by the image processing section
54
. Further, based on the perforating data subjected to the conversion processing, the image perforating section
55
thermally perforates stencil sheet. Further, the perforated stencil sheet is mounted to a printing drum. Further, when there is an input instructing start of printing operation from the operation panel section
51
, printing operation of a number of sheets set and inputted from the operation panel section
51
is carried out at the printing section
56
.
Further, as other constitution, there is known a stencil printing system, wherein a data editing apparatus such as a personal computer is connected to a stencil printing machine via an interface apparatus (data developing apparatus). According to the stencil printing system, image data from the data editing apparatus such as a personal computer is subjected to a processing of converting the image data into binary data (perforating data) which is used for perforating by the data developing apparatus and stencil sheet is thermally perforated based on perforating data of one edition subjected to the conversion processing and transferred.
According to such a stencil printing machine or stencil printing system, a large number of sheets of printing can be carried out in a short period of time and at high speed by rotating the printing drum at high speed.
Meanwhile, most of stencil sheet used in a stencil printing machine or a stencil printing system of this kind is constituted by pasting together a thermally-sensitive film and a porous supporter and is provided with print resistance function to some degree. However, there is a limit in a number of sheets which can be printed in one operation.
Therefore, when there is carried out printing operation of stencil sheet by a durable number of print sheets for each stencil sheet or more, slender lines or horizontal rules perforated on the stencil sheet are cut or paper powder of print sheet is adhered to the stencil sheet. Further, with an increase in a number of sheets of printing, deteriorations of print image caused by paper powder occurs. Further, the stencil sheet is gradually elongated by tension in printing and printed image is also elongated. As a result, image quality of printed image is deteriorated and printed matter having excellent image quality cannot be provided.
Therefore, according to a conventional stencil printing machine or a stencil printing system, when one original document is intended to print by the durable number of print sheets for each stencil sheet or more of stencil sheets, the stencil sheet which has been used is discharged. Further, after carrying out again processings of the same image data (reading processing, processing of developing to perforating data, processing of transferring data), a new one of stencil sheet must be perforated again.
Further explaining, when stencil making operation is carried out by reading original document by an image scanner, the stencil making operation must be carried out again by reading the same original document by the image scanner by one more time.
When the stencil making operation is carried out by transferring image data from a data editing apparatus such as a personal computer, the stencil making operation must be carried out by transferring again the image data by one more time.
Further, when the stencil making operation is carried out again from original document, there is a case in which printed matter the same as that in the first time cannot be provided by a positional shift of original document or an error in reading the original document by an image scanner and there poses a problem of being devoid of reproducibility.
When the stencil making operation is carried out again by image data from a data editing apparatus such as a personal computer, the positional shift in perforating is difficult to cause. However, since image data of the data editing apparatus is again converted into binary data which is used for perforating and transferred, a time period of developing image is extraneously taken, causing loss in operational time period.
SUMMARY OF THE INVENTION
Hence, the present invention has been carried out in view of the above-described problem and it is an object thereof to provide a stencil printing machine and a stencil printing method capable of carrying out desired stencil printing by shortening an operational time period without causing a shift in a stencil position by holding data which has been made once and using the held data in stencil making again.
In order to achieve the above-described object, according to a first aspect of the present invention, there is provided a stencil printing machine including:
a conversion processing section (image processing section
2
c
or data developing apparatus
8
) for processing to convert image data into perforating data capable of being perforated to a stencil sheet,
a data holding section
5
for holding the perforating data subjected to the conversion processing as re-perforating data; and
a printing section
3
for perforating the stencil sheet based on the perforating data subjected to the conversion processing and printing a print sheet by using the perforated stencil sheet.
According to the aspect of the present invention, the perforating data subjected to the conversion processing by the conversion processing section
2
c
or
8
is held in the data holding section
5
. Therefore, it is not necessary to carry out again the processing of the image data (reading processing, processing of developing the image data to the perforating data, processing of transferring data).
According to a second aspect of the present invention, there is provided the stencil printing machine including:
an image reading section
2
a
for reading an image of an original document,
an image processing section
2
c
for processing to convert image data read by the image reading section
2
a
into the perforating data which is used for perforating to the stencil sheet,
an image perforating section
2
b
for thermally perforating the stencil sheet in accordance with the image of the perforating data from the image processing section
2
c
,
a printing section
3
for printing a print sheet by using the stencil sheet perforated by the image perforating section
2
b
, and
a data holding section
5
for holding the perforating data as re-
Miyata Masakazu
Nishihata Masahiro
Kanesaka & Takeuchi
Riso Kagaku Corporation
Yan Ren
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