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JPS5181121

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DESCRIPTION JPS5181121
1) Title of invention '4; Agent 5: Add-on list of one hundred and the like [Japanese] [Japanese]
Japanese Patent Office ■ Japanese Patent Application Laid-Open No. 51-811210 Japanese
Patent Application No. 51. (1976) 7.15 Patent Application Japanese Patent Application No. 4
[Phase] Application date pasted, (197 st. /りど41.! 6.3, -7) 2 so that such a diaphragm 4 'or
as it is formed a fibrous diaphragm manufacturing method
Osakahafuneyagashirashishirashincho Address, Osaka Prefecture Neyagawa City Nisshincho 2nd
No.1 Onkyo Co., Ltd. Osaka 7 Neyagaishi Nitsu Shinsho Kaijo 572572 Osaka Prefecture i> City
for City Nisshincho a No. 1 Name (02'7 ) Takeshi Goshiro President Onkyo Co., Ltd.
3. Detailed Description of the Invention The present invention is to manufacture a fibrous
diaphragm to obtain a homogeneous product diaphragm without any worm-like bumps formed
on the back surface (tenth surface) of a conical fibrous diaphragm used for a cone-shaped
speaker. On the way. A conventional method for producing a fibrous diaphragm is a mixed water
3 in which a conical paper mold (net) 1 consisting of a rigid die-cut plate is disposed below a
paper processing tank 2 and paper fibers are mixed and suspended. The paper sheet 1 was
allowed to flow down through the perforations of the mold 1, and the pile 4 of paper fibers
formed on the mold 1 could be dried and peeled off for finishing. According to this
manufacturing method, a large number of earthworm-like bumps 5 are generated on the back
surface (the upper surface p of the paper fiber deposit 4), which causes inhomogeneity. The
earthworm-like protuberance 5 is formed in the paper fiber structure 4 in which the
papermaking water is accumulated in the papermaking process 1 in the paper making process in
which the water passes through the through holes of the papermaking mold 1 and drops
downward. When dewatering is carried out through the paper fiber structure while being
subjected to the pressure and suction force applied to the whole of the papermaking water
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through the water contained in the papermaking water, the watering passage 6 of the paper
making water is It is generated by remaining in the form of earthworm-like bumps 5. Further,
when observed finely, in the inside of the paper fiber structure 4 described above, the lower layer
(layer close to the papermaking mold) is pressed and fixed to the papermaking mold 1 by the
pressure from above, and the upper layer is surface tension of water and fibers Since it is
condensed by the cohesion of water, the pressure of the water acts as if it passes through the
relatively weakly concentrated middle layer, and the water passage 6 inside is drained
continuously It is observed that the outer layer 7 has a wormlike ridge 5 covered with a thin fiber
membrane. Thus, as the water surface of the papermaking water EndPage: 1 or the papermaking
die 1 is sequentially moved downward, air pressure is applied to the accumulation of paper fibers
of the papermaking die 1's side, and this earthworm-like raised Since the water contained in the
portion 8 other than 5 is sucked and discharged, the earthworm-like protuberance 5 becomes
relatively bulky (FIG. 4). The present invention is a method for producing a fibrous diaphragm in
which the generation process of the earthworm-like protuberance 5 is notated, and the
generation of the ridge is cut off, and the generation is determined as a wet shear. It will be
described in detail below. For example, a thin body 9 of an open-cell foamed resin such as
maltobrene is placed on a rigid circular rust-shaped papermaking mold 1 and placed in a paper
making tank 2 to mix paper fibers with water 3 for paper making Paper fibers are deposited on
the die 1 and made up. In this case, when the water passes through the through-hole of the mold
1, it passes through the slit of the second thin body 9 of the mold 1 or the slit is narrowly
inserted. Acting as a water flow resistance, it is pressed by the thin body 9 or the mold 1 by the
negative hydrostatic pressure acting on the two water surfaces, and the slit is further reduced to
make the water flow resistance larger and the water more and more It becomes difficult to pass.
The paper fiber structure 14 deposited in this way produces a wormlike ridge 15 on the back
surface (upper surface), but since the suction force of the paper water is weakened due to the
above-mentioned water resistance of the thin body 9, It does not occur noticeably in the past and
its height is low. Moreover, when the negative pressure of the air by the papermaking water is
removed, the thin body 9 recovers to its original shape by its own elasticity, so that the paper
fiber structure 14 deposited thereon becomes inconspicuous by its recovery power. In this way,
even if the low earthworm-like protuberance 15 is generated, it may be raised or raised around
its periphery and disappear, and a diaphragm 14 'of uniform thickness can be obtained from the
whole. In addition, since the degree of water flow can be arbitrarily changed by appropriately
selecting the material of the thin body 9 described above, the thickness of the up-laid fiber
deposit 4 may be, for example, a thick central portion and a peripheral portion In addition, it is
very easy to change the thickness partially, such as making it thin. As described above, according
to the present invention, the water resistant one-body thin film 9 having water permeability and
elasticity "calf" property is placed on the "2" of the paper making mold 1 and then made into a
conventional paper. It is a manufacturing direction to obtain a homogeneous diaphragm 14
'which does not leave earthworm-like bumps 5 on the surface. The diaphragm 14 'obtained by
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such a method is mounted on a speaker to generate a good reproduced sound without distortion.
4. Brief description of the drawings Fig. 1 is a cross-sectional view showing a conventional
method of making a paper, Fig. 5 is a cross-sectional view showing the method of making a paper
of the present invention, and Fig. 2 is a paper mold 1 taken out of a paper making tank. FIG. 3
and FIG. 4 show fiber cross sections of the conventional method and FIG. 6 show fiber cross
sections of the method of the present invention, respectively. 1 is a papermaking mold and 9 is a
breathable elastic body. EndPage: 26, Invention inventor other than the above (1) Invention
inventor address 住所 Fi Fi ′ ′%% 、 号 No. No Onkyo Co., Ltd. Ekita taro Name Eguchi 部
Department corrected procedure オ 0 天 z 0 天 sum Patent No. 50, 3 No. 2, 8 and 8, Patent Office
Secretary 1, Display of the Case Showa 150 Patent No. 5694 No. 2, Title of the Invention 2, Name
of the Invention Fiber Vibrator Manufacturing Method Relationship with the case (person)
Representative director Goshiro Takeshi 4, agent Kusunari (1000 5 '72> Nayagawa city
Nisshincho 2 5 1 Osaka Prefecture, correctional orders by town March 8, 1959, 6 corrections , A
brief description of the drawing, 狽 7, Town EndPage: 3 (7.1), page 5, line 12 to line 13 of r 4, a
brief description of the drawing, FIG. 6 is a view showing a fiber cross section of the method of
the present invention, respectively, during the description of. 6 and 7 are each a view showing a
fiber cross section of the method of the present invention. Correct with 1. ・−・、ハ
EndPage: 4
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