Roller for hot stamping

Patent metadata

Field	Value
Publication number	US-12583249-B2
Application number	US-202418627003-A
Country	US
Kind code	B2
Filing date	Apr 4, 2024
Priority date	Apr 6, 2023
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A hot stamping roller, the roller being designed to cooperate with an object to be decorated, the roller comprising at least a first roller part and a second roller part, each roller part being configured to rotate around a longitudinal axis of the roller, the rotation of the first roller part being independent of the rotation of the second roller part.

First claim

The invention claimed is:

1 . A hot stamping roller designed to cooperate with an object to be decorated, the roller comprising:
roller parts including at least a first roller part and a second roller part, wherein the first and second roller parts have different diameters, each of the first and second roller parts configured to rotate around a longitudinal axis of the roller, rotation of the first roller part being independent of rotation of the second roller part, wherein the first and second roller parts are configured to rotate around the longitudinal axis of the roller while contacting a film between the roller parts and the object, the diameters of the first roller part and the second roller part being different so that velocities of surfaces of the first roller part and the second roller part at points of contact with the object are equivalent over a section of the object being decorated by the roller and the film.

2 . The hot stamping roller according to claim 1 , wherein at least one of the first roller part or the second roller part is cylindrical, conical, concave, or convex.

3 . The hot stamping roller according to claim 1 , wherein a first surface of the first roller part that contacts the film during decoration of the object is one of a cylindrical surface, a conical surface, a concave surface, or a convex surface, and a second surface of the second roller part that contacts the film during decoration of the object is a different one of the cylindrical surface, the conical surface, the concave surface, or the convex surface.

4 . The hot stamping roller according to claim 1 , wherein the roller comprises a carrier core.

5 . The hot stamping roller according to claim 1 , wherein each of the first and second roller parts comprises a carrier core and a surface part.

6 . The hot stamping roller according to claim 5 , wherein the surface part of at least the first roller part is made in one piece with the carrier core.

7 . The hot stamping roller according to claim 1 , further comprising an axle, wherein the first and second roller parts are mounted on the axle.

8 . The hot stamping roller according to claim 7 , wherein at least the second roller part comprises a plain bearing between the at least the second roller part and the axle enabling the second roller part to freely rotate around the longitudinal axis of the roller.

9 . The hot stamping roller according to claim 7 , wherein at least the second roller part comprises at least one roller bearing between the at least second roller part and the axle, the at least one roller bearing enabling the second roller part to freely rotate around the longitudinal axis of the roller.

10 . The hot stamping roller according to claim 9 , wherein each of the first and second roller parts comprises at least one roller bearing enabling the respective first or second roller part to independently rotate relative to another of the second or first roller part.

11 . The hot stamping roller according to claim 1 , wherein the first and second roller parts comprise a plain bearing enabling the first and second roller parts to freely rotate around the longitudinal axis of the roller independently of each other.

12 . The hot stamping roller according to claim 8 , wherein the first roller part rotates with the longitudinal axis of the roller and the second roller part freely rotates relative to the longitudinal axis of the roller.

13 . The hot stamping roller according to claim 1 , wherein each of the first and second roller parts is configured to rotate around the longitudinal axis of the roller while contacting the film between the roller parts and the object, the first and second roller parts contacting the film and transferring part of the film onto the object.

14 . The hot stamping roller according to claim 13 , wherein the first roller part and the second roller part have conical surfaces that contact the film and different diameters.

15 . The hot stamping roller according to claim 13 , wherein the first roller part and the second roller part have concave or convex surfaces that contact the film.

16 . The hot stamping roller according to claim 13 , wherein surfaces of the first roller part and the second roller part that contact the film are heated.

17 . A hot stamping machine comprising a hot stamping roller, the roller designed to cooperate with an object to be decorated, the roller comprising at least a first roller part and a second roller part, wherein the first and second roller parts have different diameters, each of the first roller part and the second roller part configured to rotate around a longitudinal axis of the roller while contacting a film and transferring a part of the film onto the object, rotation of the first roller part being independent of rotation of the second roller part,
wherein the diameters of the first roller part and the second roller part are different so that velocities of surfaces of the first roller part and the second roller part at points of contact with the film are equivalent over a section of the object being decorated by the roller and the film.

18 . The hot stamping machine according to claim 17 , comprising first and second film feed systems that move the film between the roller and the object.

Assignees

• Illinois Tool Works

Inventors

• Callamand Laurent
• De Simone Rodolphe
• Villeneuve Arnaud
• Pradines Nicolas

Classifications

• B44B5/0009 Primary

  Rotating embossing tools · CPC title

• B44B5/0076 Primary

  having a series of embossing tools each of which can be brought into working position · CPC title