WO2010010580A4

WO2010010580A4 - A device and method for embossing of packaging material like foil, paper or metalized paper

Info

Publication number: WO2010010580A4
Application number: PCT/IN2009/000413
Authority: WO
Inventors: Rakesh Nanjundiah
Original assignee: Rakesh Nanjundiah
Priority date: 2008-07-21
Filing date: 2009-07-20
Publication date: 2010-05-06
Also published as: WO2010010580A2; WO2010010580A3

Abstract

Packaging material is embossed by passing between two fine teethed rotating rolls, which are pressed against one another. Both the rolls have fine pyramidal teeth on them. The teeth are designed and manufactured such that the apex angle of the pyramids of one of the rolls is different from the apex angle of the pyramid of the other roll. This differential angle of the two pyramids will provide operational clearance for each teeth and thus reduce the friction between the two rolls and increase the flexibility of the system in the practical dynamic condition of the embossing in the packaging industry. This will also function as one or more variable parameter to vary the quality and texture of embossing.

Claims

AMENDED CLAIMS received by the International Bureau on 26 February 2010 (26.02.10).

1. A device for embossing packaging material like foil, paper or metalized paper placed between the two rolls pressed against each other, the driving roll "A" being driven by external power, while the other driven roll "B" being driven by the driving roll by meshing of the two rolls, the arrangement being such that each roll has small pyramids, wherein the pyramids of the driving roll "A" having an apex angle dimensionally different from the apex angle of the pyramids on the driven roll "B".

2. The device of claim 1, wherein the pyramids have rectangular or square base.

3. The device of claim 1 or 2, wherein the apex angle of the pyramids present on each of the rolls in the circumferential direction and the axial direction are different to provide varying clearances in the two directions.

4. The device of any one of claim 1 or 2, wherein the said apex angle in the axial and the cylindrical direction are same so that the clearances in the axial and the cylindrical direction are equal.

5. The device of any one of preceding claims, wherein the apex angle of the pyramids on the driven roll "B" is lesser than the apex angle of the pyramids on the driving roll "A".

6. The device of any one of preceding claims, wherein the pyramids of both the rolls are full pyramids.

7. The device of any one of preceding claims, wherein one roll has full pyramids and the other roll has truncated pyramids.

8. The device of any one of preceding claims, wherein both the rolls have truncated pyramids.

9. The device of claim 8, wherein the extent of truncation of the pyramids in the two rolls are same.

10. The device of claim 8, wherein the extent of truncation of the pyramids in the two rolls are different.

11. The devices of any one of claims 1 to 10, wherein a difference of 6 to 12 degrees is maintained between the apex angles of the two rolls.

12. A method of embossing packaging material like foil, paper or metalized paper, said method comprising the steps of: passing said packaging material between pyramidal teeth of a driving roll "A" and driven roll "B" of an embossing device, wherein the apex angle of said pyramidal teeth of the driving roll and driven roll are dimensionally different and configured to mesh freely and emboss a pattern on said packaging material when pressed together; pressing said packaging material between the pyramidal teeth of the driving and driven rolls with the driving roll set into motion thereby embossing the packaging material with the pattern provided by the pyramidal teeth meshing from two sides of the packaging material; and withdrawing the embossed packaging material out of the embossing device.

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