Printing – Stenciling – Stencils
Reexamination Certificate
2001-02-12
2002-11-12
Yan, Ren (Department: 2854)
Printing
Stenciling
Stencils
C101S116000
Reexamination Certificate
active
06477947
ABSTRACT:
BACKGROUND OF THE INVENTION AND RELATED ART STATEMENT
The present invention relates to a stencil printing machine having a stencil making apparatus for stencil making stencil sheet set to a printing drum, particularly to a stencil printing machine for supplying stencil sheet perforated by a single stencil making apparatus to a plurality of printing drums.
FIG. 26
is a side view showing a conventional stencil printing machine. Stencil sheet S to be perforated is wound in a shape of a roll and is rotatably supported. Stencil sheet S drawn from a stencil sheet S in the shape of a roll is constituted by a shape of a continuous strip. The drawn stencil sheet S is sandwiched between a thermal head
150
and a platen roller
151
.
Stencil sheet S is thermally perforated by the thermal head
150
. During a time period in which stencil sheet S is thermally perforated, stencil sheet S is transferred while being brought into contact with the thermal head
150
by rotation of the platen roller
151
. Thereafter, stencil sheet S is contained in a store box
152
until thermal perforation of one block has been finished by the thermal head
150
. Stencil sheet S is contained in the store box
152
by stopping upper and lower load rollers
153
and
154
disposed on an upper side of the store box
152
while sandwiching stencil sheet S and feeding stencil sheet S only by the platen roller
151
. Further, a common transfer path
155
is arranged on a front side of the store box
152
. The common transfer path
155
is provided with cutter means
156
for cutting perforated stencil sheet S by an amount of one block.
After finishing the thermal perforation, the thermal head
150
is moved in an upper direction to thereby release the thermal head
150
from sandwiching stencil sheet S along with the platen roller
151
. Stencil sheet S which has been thermally perforated is transferred to printing drums
157
by the upper and lower load rollers
153
and
154
via the common transfer path
155
.
Meanwhile, according to the stencil making apparatus shown by
FIG. 26
, perforated stencil sheet S is transferred to two of the printing drums
157
. Therefore, the stencil making apparatus is provided with respective transfer paths
158
for transferring stencil sheet S to the respective printing drums
157
after transferring through the common transfer path
155
and a switch mechanism
160
for selectively switching the transfer paths
158
such that the common transfer path
155
communicates with either of the transfer paths
158
.
The respective transfer path
158
transfers stencil sheet S by a plurality of transfer roller pairs
159
while guiding stencil sheet S between upper and lower guide plates
158
a
and
158
b
. The switch mechanism
160
is arranged between the common transfer path
155
and the respective transfer paths
158
and is provided with a shunt transfer path
162
movable by a solenoid
161
. The shunt transfer path
162
moved by the solenoid
161
opens communication from the common transfer path
165
to one of the transfer paths
158
or from the common transfer path
155
to other of the transfer paths
158
.
A front end of stencil sheet S transferred to the one transfer path
158
or the other transfer path
158
is pinched by a clamp plate
163
provided to the printing drum
157
, fixed to the printing drum
157
and thereafter, transferred by rotation of the printing drum
157
and is wound on a peripheral face of the printing drum
157
. Further, print sheet S is cut by an amount of one block by the cutter means
156
while being transferred or while being set to the printing drum
157
.
Further, with regard to the stencil printing machine shown by
FIG. 26
, a portion of a peripheral wall
164
of the printing drum
157
is ink-permeable. There is provided ink supplying means, not illustrated, for supplying ink to an inner face of the peripheral wall
164
at an inner portion of the printing drum
157
. There is provided pressing means, not illustrated, for pressing print sheet to the printing drum
157
on a lower side of the printing drum
157
. The stencil printing machine rotates the printing drum
157
, feeds print sheet to between the printing drum
157
and the pressing means at predetermined timings and presses the print sheet to an image portion of stencil sheet S mounted to the printing drum
157
. Print ink supplied from inside of the printing drum
157
permeates through the peripheral wall
164
of the printing drum
157
and transcribed from a perforated portion of stencil sheet S onto print sheet to thereby form an image.
However, according to the above-described conventional stencil printing machine, when stencil sheet S perforated by the stencil making apparatus is transferred to the printing drum
157
, there is needed the long transfer path
158
particularly for transferring stencil sheet S to the printing drum
157
disposed remote from a position provided with the stencil making apparatus per se. Therefore, a control in transferring the stencil sheet S at the respective transfer paths
158
, differs thereby. That is, for example, it is conceivable that a drive timing of the cutter means
156
, a switch timing of the switch mechanism
160
(a time period of switching to the longer one of the transfer paths
158
is prolonged) and drive time periods and drive timings of the respective transfer roller pairs
159
, differ and there poses a problem in which a complicated control is requested by combining these.
Further, when printing drum information of the respective printing drums
157
such as ink color or the like differs, in addition to the fact that the control with regard to the transfer is complicated, further complicated control is needed.
SUMMARY OF THE INVENTION
Hence, in order to resolve the above-described problem, it is an object of the present invention to provide a stencil printing machine capable of pertinently controlling stencil making and transfer (setting) of stencil sheet respectively in correspondence with a plurality of printing drums.
In order to achieve the above-described object, according to an aspect of the present invention, there is provided a stencil printing machine comprising:
a stencil making unit for stencil making stencil sheet;
a plurality of printing drums capable of setting the perforated stencil sheet;
a movement mechanism for moving the stencil making unit to the respective printing drums;
position detecting means for detecting a position of the stencil making unit;
printing drum information detecting means for detecting printing drum information with regard to the respective printing drums;
displaying means for displaying stencil making instruction information for making the stencil making unit execute a stencil making operation; and
control means for making the displaying means display the stencil making instruction information capable of dealing with the printing drum information, making the stencil making unit execute the stencil making operation based on the stencil making instruction information and making the stencil making unit move.
According to the stencil printing machine of the first aspect of the present invention, in the stencil printing machine having the stencil making apparatus for transferring perforated stencil sheet to the plurality of printing drums, the single stencil making unit is moved and stencil making and setting operation is carried out at the respective printing drums. Further, the position of the stencil making unit is detected, the printing drum information of the respective printing drums is detected and stencil making instruction information is displayed in correspondence with the detection.
Thereby, control of stencil making and setting stencil sheet at the stencil making unit becomes uniform with respect to the printing drums and the control can be simplified. Further the operator is expedited by display of set of the original respectively in correspondence with printing drum information of the plurality of printing drums and therefore, erroneous operation by the operat
Kanesaka & Takeuchi
Riso Kagaku Corporation
Yan Ren
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