Manufacturing container or tube from paper; or other manufacturi – Container making – Rigid container
Reexamination Certificate
2001-03-16
2003-04-15
Kim, Eugene (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Container making
Rigid container
C493S093000, C242S410000, C242S412000
Reexamination Certificate
active
06547708
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tension fluctuation absorbing device and a cardboard sheet manufacturing apparatus equipped with this device and more particularly to the present invention relates to a tension fluctuation absorbing device and a cardboard sheet manufacturing apparatus equipped with this device which make it possible to manufacture a cardboard sheet with good quality by reliably absorbing fluctuations in the tension generated in the material paper.
2. Prior Art
A recently developed cardboard sheet manufacturing apparatus makes it possible to manufacture a cardboard sheet by accomplishing good bonding between the core and liner with hardly applying a nip pressure between the core and liner.
This cardboard sheet manufacturing apparatus will be described below with reference to a case in which a single-faced cardboard sheet is manufactured and a case in which a double-faced cardboard sheet is manufactured.
FIG. 7
is an overall schematic system diagram of a conventional single-faced cardboard sheet manufacturing apparatus.
As shown in
FIG. 7
, the single-faced cardboard sheet manufacturing apparatus
100
is comprised of: a roll stand
120
which is equipped with material paper rolls; a splicer
140
which performs paper splicing; and a single-facer
160
which manufactures a cardboard sheet by gluing together a core material paper B and a liner material paper A which are respectively fed out from the roll stand
120
and spliced in some cases. These components are arranged in the described order from the upstream side toward the downstream side of the line through which the material paper is fed. In the following description, the “line” refers to a path along which the material paper is fed.
The roll stand
120
has a liner driven roll
180
around which the liner material paper A is wound, and a core driven roll
200
around which the core material paper B is wound. These respective driven rolls
180
and
200
are equipped with reserve rolls (only
180
b
is shown) used for paper splicing, and the apparatus is arranged. When the material paper of the roll currently being used is exhausted, this paper is spliced to the corresponding reserve roll by the splicer
140
, which will be described later.
The splicer
140
is a paper-splicing device and has: a pressing contact mechanism
260
which performs paper splicing by pressing the material paper on the material paper roll currently in operation against the material paper on the material paper roll held in reserve; an accumulator roll unit
320
which is disposed on the downstream side of the line from this pressing contact mechanism
260
and which consists of a plurality of accumulator rolls
280
and a plurality of supporting rolls
300
; and a roll moving means which moves the plurality of accumulating rolls
280
between an ordinary operating position and a paper-splicing position. A plurality of strips of accumulated material paper are formed by these rolls. As a result of this structure, the material paper in use is accumulated by winding the material paper onto the accumulator rolls
280
in a number of stages, and the accumulator rolls
280
are moved from the ordinary operating position to the paper-splicing position immediately prior to the splicing of the paper, thus ensuring that a surplus amount of material paper is maintained with respect to the amount of material paper that is fed out by the line, so that the old material paper and new material paper are spliced by a two-sided tape glued to the new material paper beforehand while the paper in use is maintained in a state which is the same as the paper being stopped, after which the accumulator rolls
280
are returned to the ordinary operating position.
The single-facer
160
has a first stepped driving roll
360
. It also has a second stepped driving roll
380
which is disposed so that the core material paper B is passed between this second stepped driving roll
380
and the first stepped driving roll
360
and formed into a corrugated shape as a result of the rotation of the aforementioned first stepped driving roll
360
. Furthermore, a first guide roll
400
is installed on the first stepped driving roll
360
on the advancing side in the direction of rotation of the first stepped driving roll
360
with respect to the second stepped driving roll
380
. The first guide roll
400
is used in cooperation with the first stepped driving roll
360
to guide the liner material paper A in a configuration in which the liner material paper A is superimposed on the core material paper B. Also, a second guide roll
440
is installed on the advancing side in the direction of rotation of the first stepped driving roll
360
with respect to the aforementioned first guide roll
400
. The second guide roll
440
is used in cooperation with the first stepped driving roll
360
to guide the glued liner material paper A and core B. Furthermore, a glue application roll
420
, which is used to apply glue to the core that has been formed into a corrugated shape, is installed on the first stepped driving roll
360
between the first guide roll
400
and the second stepped driving roll
380
.
The liner material paper A supplied to the single-facer
160
is fed in contact with the circumferential surface of the drum of a pre-heater
150
. The liner material paper A is thus preheated. The single-faced cardboard sheet D manufactured by the single-facer
160
is supplied by take-up conveyors
700
to a transfer conveyor
710
and further to a double-facer (not shown)
With the above structure, the fed-out core material paper is formed into a corrugated core by being passed between the first stepped driving roll
360
and second stepped driving roll
380
under a specified nip pressure; then, while glue is applied by the glue application roll
420
. The fed-out liner A is, along with the glue-coated core B, fed along the outer circumferential surface of the first stepped driving roll
360
and passes between the first stepped driving roll
360
and the first guide roll
400
and then between the first stepped driving roll
360
and the second guide roll
440
.
In this case, the rotational speed of the second guide roll
440
is set at a greater speed than the rotational speed of the first stepped driving roll
360
. As a result, a specified tension is applied to the liner material paper A between the first guide roll
400
and the second guide roll
440
, thus causing the liner material paper A to be pressed against the outer surface of the first stepped driving roll
360
while clamping the core B. While the liner material paper A and core B are guided in this state, the bonding of the liner material paper A and core B is completed, so that the production of a single-faced cardboard sheet is completed.
As seen from the above, good bonding of the core and liner A is accomplished by applying tension to the liner A between the first guide roll
400
and second guide roll
440
instead of applying a large nip pressure to the liner A and core between the first stepped driving roll
360
and first guide roll
400
. In other words, by performing the gluing of the core and liner in a surface contact configuration instead of the conventionally used linear contact configuration, it is possible to prevent the formation of pressure scars on the outer surface of the liner, and to prevent deleterious effects on subsequent processes such as the bar code printing process, etc.
Next, a double-faced cardboard sheet manufacturing apparatus will be described. In order to manufacture a double-faced cardboard sheet by gluing a back liner to a single-faced cardboard sheet manufactured by a single-facer, the double-faced cardboard sheet manufacturing apparatus has the single-faced cardboard sheet manufacturing apparatus, a back liner supply device which supplies a back liner, and a double-facer which is used to manufacture the double-faced cardboard sheet. The back liner supply device has a back liner roll stand and a splicer. Meanwhile, t
Kawamura Masanori
Kunimoto Masanori
Kabushiki Kaisha Isowa-Hooperswift
Kim Eugene
Koda & Androlia
LandOfFree
Tension fluctuation absorbing device and cardboard sheet... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tension fluctuation absorbing device and cardboard sheet..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tension fluctuation absorbing device and cardboard sheet... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3082857