Last, method for producing last, and method for producing shoe upper

Patent metadata

Field	Value
Publication number	US-11622604-B2
Application number	US-202016915245-A
Country	US
Kind code	B2
Filing date	Jun 29, 2020
Priority date	Dec 19, 2019
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A last is provided for shaping a shoe upper, such as a custom-made last tailored to a user's foot. Embodiments include a last for shaping a shoe upper including at least an outer peripheral portion comprising an aggregate of a plurality of blocks, the plurality of blocks being joinable together to form a portion of the last and shape the shoe upper, and separable from each other after being joined together. The plurality of blocks includes a first plurality of blocks which are identical to each other. Embodiments also include a method for producing a last for shaping a shoe upper, the method including forming the last by joining a plurality of blocks together to form an aggregate, the plurality of blocks including a first plurality of blocks which are identical to each other.

First claim

What is claimed is:

1. A last for shaping a shoe upper, the last comprising:
at least an outer peripheral portion comprising an aggregate of a plurality of blocks,
the plurality of blocks being joinable together to form a portion of the last and shape the shoe upper, and separable from each other after being joined together; and
a cover part attached to the plurality of blocks and shaped to fill steps or gaps among the aggregate of the plurality of blocks caused by connecting adjacent ones of the blocks, to form an outer peripheral shape of the last, the outer peripheral shape of the last including a curved surface disposed over the steps or gaps;
wherein the plurality of blocks includes a first plurality of blocks which are identical to each other.

2. The last according to claim 1 , wherein the last has a hollow interior.

3. The last according to claim 2 , further comprising:
a central part formed in advance as a core; and
a peripheral part that is constituted by the aggregate of the plurality of blocks formed on an outer peripheral portion of the central part.

4. The last according to claim 2 , wherein
each of the plurality of blocks has at least an outer peripheral surface formed of a material of high heat conductivity.

5. The last according to claim 2 , wherein
the plurality of blocks include blocks of different shapes, and
each of the blocks of different shapes has an identifier for allowing a shape of the each of the blocks of different shapes to be externally identifiable.

6. The last according to claim 1 , further comprising:
a central part formed in advance as a core; and
a peripheral part that is constituted by the aggregate of the plurality of blocks formed on an outer peripheral portion of the central part.

7. The last according to claim 6 , wherein
each of the plurality of blocks has at least an outer peripheral surface formed of a material of high heat conductivity.

8. The last according to claim 6 , wherein
the plurality of blocks include blocks of different shapes, and
each of the blocks of different shapes has an identifier for allowing a shape of the each of the blocks of different shapes to be externally identifiable.

9. The last according to claim 1 , wherein
each of the plurality of blocks has at least an outer peripheral surface formed of a material of high heat conductivity.

10. The last according to claim 1 , wherein
the plurality of blocks include blocks of different shapes, and
each of the blocks of different shapes has an identifier for allowing a shape of the each of the blocks of different shapes to be externally identifiable.

11. The last according to claim 1 , wherein
the plurality of blocks include blocks of different sizes, and
relatively large blocks are arranged on an inner side of the last and relatively small blocks, which are smaller than the relatively large blocks, are arranged on an outer side of the last.

12. The last according to claim 1 , wherein
each of the plurality of blocks has a hollow interior.

13. The last according to claim 1 , comprising:
the aggregate of the plurality of blocks on an upper side of a plate-shaped base part for shaping a lower part of the shoe upper.

14. A method for producing a shoe upper, comprising:
placing an unshaped upper on the last according to claim 1 , the unshaped upper composed of a fiber sheet comprising heat-shrinkable yarns; and
shaping the unshaped upper in conformity with the shape of the last by heating to obtain a shaped upper.

15. A method for producing a last for shaping a shoe upper, the method comprising:
forming the last by joining a plurality of blocks together to form an aggregate, the plurality of blocks including a first plurality of blocks which are identical to each other; and
at least partially covering an outer peripheral portion of the aggregate of the plurality of blocks by a cover part attached to the plurality of blocks and shaped to fill steps or gaps among the aggregate of the plurality of blocks caused by connecting adjacent ones of the blocks, to form an outer peripheral shape of the last, the outer peripheral shape of the last including a curved surface disposed over the steps or gaps.

16. The method for producing the last according to claim 15 , further comprising:
acquiring a user's foot shape data;
generating block joining data from the user's foot shape data; and
joining the plurality of blocks together based on the block joining data to form the last.

17. The method for producing the last according to claim 16 , further comprising:
creating the block joining data based on the user's foot shape data individually generated for each of a plurality of users.

18. The method for producing the last according to claim 17 , further comprising:
generating the user's foot shape data from image data obtained by capturing an image of the user's foot.

19. The method for producing the last according to claim 15 , further comprising:
disassembling the last, after being used, into the plurality of blocks.

Assignees

• Asics Corp

Inventors

• BESSHO Ayu
• Taniguchi Norihiko
• Abe Satoru
• Takashima Shingo
• Kozuka Yuya

Classifications

• A43B23/0215

  Plastics or artificial leather · CPC title

• A43D3/02 Primary

  Lasts for making or repairing shoes (making of wooden lasts B27M3/20) · CPC title

• A43B1/0054

  provided with magnets, magnetic parts or magnetic substances · CPC title

• A43B3/0047

  parts having a male and corresponding female profile to fit together, e.g. form-fit · CPC title

• A43B23/0205

  characterised by the material (material of the lining A43B23/07, material of toe stiffeners or heel stiffeners A43B23/08) · CPC title