Digital last

Patent metadata

Field	Value
Publication number	US-10383405-B2
Application number	US-201715478902-A
Country	US
Kind code	B2
Filing date	Apr 4, 2017
Priority date	Apr 4, 2016
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A method and corresponding apparatus is disclosed for generating a digital last for the manufacture of a shoe for a person. The method comprises obtaining a predefined digital last, the predefined digital last comprising an axis relating to the shape of the last; obtaining data of a foot of the person; and modifying the obtained predefined digital last based on the obtained data, wherein modifying comprises at least one of translation and rotation of the axis.

First claim

What is claimed is:

1. A method for generating a digital last for the manufacture of a shoe for a person, the method comprising:
obtaining a predefined digital last, the predefined digital last comprising an axis relating to the shape of the last;
obtaining data of a foot of the person; and
modifying the obtained predefined digital last based on the obtained data, wherein modifying comprises at least one of translation and rotation of the axis, wherein the axis to be modified corresponds to a transverse axis of the foot of the person, wherein the transverse axis of the foot is formed by the straight connection between a first metatarsophalangeal joint and a fifth metatarsophalangeal joint of the foot of the person.

2. The method according to claim 1 , wherein the axis of the predefined digital last is translated and/or rotated so as to align with a corresponding axis included in the data of the foot.

3. The method according to claim 2 , wherein the modified transverse axis of the digital last is translated and/or rotated so as to be less than 2 . 5 % behind or before the transverse axis of the foot.

4. The method according to claim 1 , further comprising modifying a rearfoot longitudinal axis, wherein the rearfoot longitudinal axis of the foot of the person is obtained by determining a medium line between the middle of the transverse axis and the middle of a heel line.

5. The method according to claim 1 , wherein the digital last further comprises a footwear last bottom pattern and a forefoot width of the digital last, wherein the forefoot width corresponds to the length of the transverse axis of the foot.

6. The method according to claim 1 , further comprising determining a rearfoot distance of the foot of the person, wherein the rearfoot distance is the distance between the transverse axis and the heel of the foot of the person.

7. The method according to claim 6 , further comprising modifying the digital last by modifying the rearfoot distance to correspond to the rearfoot distance of the foot of the person.

8. The method according to claim 1 , wherein a heel of the foot is a reference point for an alignment between the digital last and the foot of the person.

9. The method according to claim 1 , wherein the digital last is modified in view of the purpose of the shoe.

10. The method according to claim 1 , wherein the digital last is modified in view of the material of the shoe.

11. The method according to claim 1 , wherein the placement of at least one cleat is determined based on the data of the foot of the person.

12. A method for manufacturing a last of a shoe based on a digital last obtained by the method according to claim 1 .

13. The method according to claim 1 further comprising manufacturing a deformable last based on the digital last.

Assignees

• Adidas Ag

Inventors

• Berger Christoph Günther
• Schweizer Fabian
• Stumpf Jürgen

Classifications

• G06F30/17

  Mechanical parametric or variational design · CPC title

• G06F2119/18

  Manufacturability analysis or optimisation for manufacturability · CPC title

• A43D1/02 Primary

  Foot-measuring devices (measuring the shape, pattern or size of the body for diagnostic purposes A61B5/103, e.g. measuring physical dimensions A61B5/107) · CPC title

• A43D2200/60

  Computer aided manufacture of footwear, e.g. CAD or CAM · CPC title

• A43D1/04

  Last-measuring devices · CPC title