U.S. patent application number 10/913732 was filed with the patent office on 2006-02-09 for shoe shole and method for making the same.
Invention is credited to Dong-Long Liu.
Application Number | 20060026863 10/913732 |
Document ID | / |
Family ID | 35755989 |
Filed Date | 2006-02-09 |
United States Patent
Application |
20060026863 |
Kind Code |
A1 |
Liu; Dong-Long |
February 9, 2006 |
Shoe shole and method for making the same
Abstract
A shoe sole is composed of particles of Ethylene Vinyl Acetate
and the particles are connected with each other with gaps defined
between the particles so as to form irregular surface of the shoe
sole. The sole is made by filling the particles to 77% to 87% of
volume of a cavity in a mold set, wherein an angle 40 to 50 degrees
is clamped between a spinning axis of the cavity and an axis to
which the mold set is rotated about. The mold set is then heated to
140 to 160 degrees Celsius and spins the mold set about the
spinning axis 22 to 32 minutes. After cooling the mold set, the
shoe sole is formed and is removed from the cavity.
Inventors: |
Liu; Dong-Long; (Pingtung
County, TW) |
Correspondence
Address: |
CHARLES E. BAXLEY, ESQ.
90 JOHN STREET
THIRD FLOOR
NEW YORK
NY
10038
US
|
Family ID: |
35755989 |
Appl. No.: |
10/913732 |
Filed: |
August 5, 2004 |
Current U.S.
Class: |
36/25R ;
428/143 |
Current CPC
Class: |
A43B 13/16 20130101;
A43B 17/08 20130101; Y10T 428/24372 20150115; A43B 7/08 20130101;
A43B 17/003 20130101 |
Class at
Publication: |
036/025.00R ;
428/143 |
International
Class: |
A43B 13/14 20060101
A43B013/14 |
Claims
1. A shoe sole comprising: a plurality of particles which are
connected with each other, gaps defined between the particles of an
outer surface of the shoe sole.
2. The sole as claimed in claim 1, wherein the particles are
Ethylene Vinyl Acetate.
3. The sole as claimed in claim 1, wherein the particles are
irregular in shape.
4. A method for making a shoe sole, comprising: step 1: preparing
short and cylindrical particles: step 2: filling the particles to
77% to 87% of volume of a cavity in a mold set, an angle 40 to 50
degrees clamped between an axis of the cavity and a spinning axis
to which the mold set is rotated about; step 3: heating the mold
set to 140 to 160 degrees Celsius and spinning the mold set for 22
to 32 minutes, and step 4: cooling the mold set and removing a shoe
sole from the cavity.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a shoe sole composed of
particles of EVA and the particles are connected with each other
with gaps defined therebetween so that the sole is light in weight
and has good ventilation feature.
BACKGROUND OF THE INVENTION
[0002] A conventional shoe sole such as the sole of sandals is made
of rubber or foam material which is a solid structure and does not
have any ventilation feature. The foam material can be injected to
be the shoe sole which includes a flat bottom and upper surface.
This conventional shoe sole tends to trap sweater or damp on the
surface where the wearer's foot steps on. Besides, the rubber made
shoe sole is heavy and does not provide satisfied ventilation
either.
[0003] The present invention intends to provide a shoe sole that
includes gaps defined between the particles so as to drain water
and provides a good ventilation feature.
SUMMARY OF THE INVENTION
[0004] The present invention relates to shoe sole includes an
irregular outer surface which includes gaps defined between the
particles of the material of the sole. The method for making the
sole includes the following the steps: [0005] step 1: preparing
short and cylindrical particles: [0006] step 2: filling the
particles to 77% to 87% of volume of a cavity in a mold set, an
angle 40 to 50 degrees clamped between an axis of the cavity and a
spinning axis to which the mold set is rotated about; [0007] step
3: heating the mold set to 140 to 160 degrees Celsius and spinning
the mold set 22 to 32 minutes, and [0008] step 4: cooling the mold
set and removing a shoe sole from the cavity.
[0009] The present invention will become more obvious from the
following description when taken in connection with the
accompanying drawings which show, for purposes of illustration
only, a preferred embodiment in accordance with the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 shows the steps of the method for making the shoe
sole of the present invention;
[0011] FIG. 2 shows the particles are filled in the cavity of the
mold set;
[0012] FIG. 3 shows the shoe sole of the present invention;
[0013] FIG. 4 shows the particles are heated and filled in the
cavity of the mold set, and
[0014] FIG. 5 is an enlarged view to show the arrangement of the
particles of the shoe sole.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] Referring to FIGS. 1 to 3, the method for making the shoe
sole 30 of the present invention comprises the following steps
which are:
[0016] Step 1: Preparing Material
[0017] Short and cylindrical particles 10 made of Ethylene Vinyl
Acetate for example are prepared.
[0018] Step 2: Filling in Cavity of Mold Set
[0019] The particles 10 are filled to 77% to 87% of volume of a
cavity 21 in a mold set 20, and an angle 40 to 50 degrees is
clamped between an axis 22 of the cavity 21 and a spinning axis 23
to which the mold set 20 is rotated about.
[0020] Step 3: Forming Process
[0021] The mold set 20 is heated up to 140 to 160 degrees Celsius
and spun for 22 to 32 minutes as disclosed in FIG. 4.
Step 4: Cooling and Removing the Shoe Sole
[0022] The mold set 20 is cooled and a shoe sole 30 is removed from
the cavity 21.
[0023] Referring to FIGS. 3 and 5, the particles 10 are spread and
filled in the cavity 21 due to the eccentric force when the mold
set 20 spins and the particles 10 are expanded and connected with
each other at the contact areas therebetween by way of fusion.
Because the particles 10 are filled only 77% to 87% of volume of
the cavity 21 of the mold set 20, there will be gaps 32 defined
between the particles 10 and the sole 30 includes an irregular
outer surface 31. The shoe sole is light in weight and easily to
manufacture. Besides, the irregular and uneven outer surface 31 of
the shoe sole 30 allows damp and water to be escaped when the sole
30 is in use.
[0024] While we have shown and described the embodiment in
accordance with the present invention, it should be clear to those
skilled in the art that further embodiments may be made without
departing from the scope of the present invention.
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