US 20120148372A1

(19) United States (12) Patent Application Publication (10) Pub. No.: US 2012/0148372 A1
Mori
(54) MOLD SET FOR PAPER BINDING

(43) Pub. Date:

Jun. 14, 2012

(76) Inventor:

Shohei Mori, lshikaWa (JP)

(1, 2) arranged to face each other and having respective opposed surfaces (3, 4) provided With respective tooth por tions (5, 6) capable of meshing With each other, the paper
sheet binding die set being con?gured to bind a plurality of stacked paper sheets in a manner that the pair of dies (1, 2) pressurize the plurality of stacked paper sheets from both sides in a thickness direction and the respective tooth portions (5, 6) of the pair of dies (1, 2) are meshed With each other. The

(21) Appl. No.:

(22) PCT Filed:
(86) PCT No.:

13/389,326
Aug. 11, 2010
PCT/JP2010/005043

respective tooth portions (5, 6) formed on the respective opposed surfaces (3, 4) of the pair of dies (1, 2) each include
a plurality of tooth portions each having a substantially trian gular shape in cross section and a predetermined tooth Width,
and provided in series on a corresponding one of the respec

371 (0X1) (2), (4) Date:

Feb. 29, 2012

(30)

Foreign Application Priority Data

(JP) ............................... .. 2009-187040

Aug. 12, 2009

tive opposed surfaces (3, 4). Of the respective tooth portions (5, 6) formed on the respective opposed surfaces (3, 4) of the
pair of dies (1, 2) , each of the plurality of tooth portions (5
(6)) of one of the pair of dies (1 (2)) includes, on one Width Wise side or both WidthWise sides, an inclined-surface portion (9) inclined in a narroWing direction toWard a peak-top por

Publication Classi?cation

(51)
(52)

Int. C1. 3423 5/00

(2006.01)

us. c1. ........................................................ .. 412/33

tion (7) of the each of the plurality of tooth portions (5 (6)) of the one of the pair of dies (1 (2)), and in each of the plurality

of tooth portions (6 (5)) of another of the pair of dies (2 (1)),

Which face the plurality of tooth portions (5 (6)) of the one of the pair of dies (1 (2)), at least a peak-top portion (7) of the each of the plurality of tooth portions (5 (6)), exists up to a position at Which the peak-top portion (7) of the each of the plurality of tooth portions (5 (6)) covers a valley-bottom portion (8) on the inclined-surface portion (9) side of the each of the plurality of tooth portions (5 (6)) of the one of the pair

(57)

ABSTRACT

Provided is a die set to be used, not only by general consumers but also by producers, in a paper sheet binding device for paper products, the die set being free from use of metal

staples, glues, or the like, being excellent in safety, produc tivity, and cost performance, and facilitating disposal of paper
sheets. The paper sheet binding die set includes a pair of dies

ofdies (1 (2)).

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Fig. 1

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MOLD SET FOR PAPER BINDING TECHNICAL FIELD

like, being excellent in safety, productivity, and cost perfor

mance, and facilitating disposal of paper sheets.

[0001]

The present invention relates to a paper sheet bind

Solution to Problems

ing die set capable of binding a plurality of paper sheets Without use of metal staples, glues, strings, cords, or the like.
BACKGROUND ART

[0009] In order to achieve the above-mentioned object, according to the invention as described in claim 1, provided is a paper sheet binding die set, including a pair of dies arranged

[0002]

Conventionally, many booklets and ledger sheets

to face each other and having respective opposed surfaces

are created by binding With use of metal staples, glues, or the like. In a case of using the metal staples for binding, hoWever,
When a bound state is incomplete, there is a risk that end

provided With respective tooth portions capable of meshing

With each other, the paper sheet binding die set being con?g
ured to bind a plurality of stacked paper sheets in a manner

portions of the metal staple protrude. [0003] Further, regarding disposal of booklets and ledger
sheets that have become unnecessary, the booklets and ledger
sheets are shredded by a shredder When necessary and then incinerated, or reused as recycled paper sheets in terms of resource conservation. In this context, in order to avoid dam age to blades of the shredder, it is necessary to remove metal

that the pair of dies pressuriZe the plurality of stacked paper

sheets from both sides in a thickness direction and the respec

tive tooth portions of the pair of dies are meshed With each other. The respective tooth portions formed on the respective opposed surfaces of the pair of dies each include a plurality of

tooth portions each having a substantially triangular shape in

cross section and a predetermined tooth Width, and provided in series on a corresponding one of the respective opposed surfaces. Of the respective tooth portions formed on the

staples from paper sheets bound With the metal staples. Fur ther, regarding paper sheets bound With glue, When the glue is
a resin-based glue such as a hot-melt glue, it is necessary to cut off glued parts of the paper sheets so that noxious gases are not generated at the time of incineration.

respective opposed surfaces of the pair of dies, each of the plurality of tooth portions of one of the pair of dies includes,
on one tooth-WidthWise side or both tooth-WidthWise sides,

[0004]

Those operations require time and effort, Which is

re?ected in costs such as a personnel cost. In order to over

an inclined-surface portion inclined in a narroWing direction

come the problem, in other Words, in order to bind paper sheets Without use of metal staples or glues, for example, there have been disclosed a binding method and a binding apparatus in Which, at the time of binding a plurality of paper sheets such as ledger sheets, moisture is supplied to each of the paper sheets, and then pressure is applied from above and

toWard a peak-top portion of the each of the plurality of tooth portions of the one of the pair of dies, and at least a peak-top

portion of each of the plurality of tooth portions of another of the pair of dies, Which face the plurality of tooth portions of
the one of the pair of dies, exists up to a position at Which the

peak-top portion of the each of the plurality of tooth portions

of the another of the pair of dies covers a valley-bottom portion on the inclined-surface portion side of the each of the plurality of tooth portions of the one of the pair of dies. [0010] According to the invention as described in claim 1, of the respective tooth portions formed on the respective

beloW by binding members respectively provided With a

series of proj ections and recesses (for example, refer to Patent Literatures l and 2).
CITATION LIST

Patent Literature

opposed surfaces of the pair of dies, each of the plurality of

tooth portions of one of the pair of dies includes, on one WidthWise side or both WidthWise sides, the inclined-surface

[0005] [0006]

Patent Literature 1: JP 3481300 B Patent Literature 2: JP 3502204 B

Summary of Invention
Technical Problems

[0007] HoWever, by the binding method according to the

technologies disclosed in Patent Literature 1 and Patent Lit erature 2, in Which moisture is supplied to each of the paper

sheets, and then pressure is applied from above and beloW by binding members respectively provided With a series of pro jections and recesses, bound parts are corrugated oWing to the moisture. Thus, the method is not applicable to aesthetic
articles such as a booklet and a brochure, and hence applica

portion inclined in a narroWing direction toWard the peak-top portion of the each of the plurality of tooth portions of the one of the pair of dies, and at least the peak-top portion of each of the plurality of tooth portions of another of the pair of dies, Which face the plurality of tooth portions of the one of the pair of dies, exists up to a position at Which the peak-top portion of the each of the plurality of tooth portions of the another of the pair of dies covers the valley-bottom portion on the inclined surface portion side of the each of the plurality of tooth portions of the one of the pair of dies. Thus, regarding the

respective tooth portions of the pair of dies facing each other,

an end portion of the peak-top portion on the inclined-surface

portion side of the each of the plurality of toothportions of the

one of the pair of dies falls Within a Width of the peak-top

tion of the method is limited to ledger sheets and the like.

Further, in order to evenly supply moisture With respect to

each of the paper sheets separately, it is necessary to install an elaborate and complex device for a preceding step of a bind ing process. Thus, in order to bind a large number of paper sheets, a scale of the device becomes larger in accordance thereWith. Those are problems With this method. [0008] It is an object of the present invention to provide a die set to be used, not only by general consumers but also by producers, in a paper sheet binding device for paper products, the die set being free from use of metal staples, glues, or the

portion of the each of the plurality of tooth portions of the another of the pair of dies. When the respective tooth portions
of the pair of dies facing each other are meshed With each

other, the peak-top portion on the inclined- surface portion

side of the each of the plurality of tooth portions of the one of

the pair of dies undergoes meshing on the end portion side Within the Width of the peak-top portion of the each of the plurality of tooth portions of the another of the pair of dies. In this Way, the valley-bottom portion on the inclined-surface portion side of the each of the plurality of toothportions of the