Apparatus and process for the production of paper web material

Patent metadata

Field	Value
Publication number	US-2018133999-A1
Application number	US-201815869770-A
Country	US
Kind code	A1
Filing date	Jan 12, 2018
Priority date	Jul 7, 2011
Publication date	May 17, 2018
Grant date	—

Abstract

An apparatus for the production of a paper web, includes: a first embossing unit ( 1 ) with a first embossing cylinder ( 2 ) and a corresponding counter-cylinder ( 3 ) for embossing a first paper ply ( 4 ); a second embossing unit ( 5 ) with a second embossing cylinder ( 6 ) and a corresponding counter-cylinder ( 7 ) for embossing a second paper ply ( 8 ), such that, once embossed, the plies have a series of oppositely oriented reliefs (R 4 , R 8 ), the embossing units ( 1, 5 ) being synchronized so that the reliefs are nested into each other; a sizing unit ( 1 C, 2 C, 3 C) associated with the first embossing cylinder ( 2 ) to distribute a predetermined amount of glue on the side of the second ply ( 8 ) opposed to that from which the respective reliefs (R 8 ) emerge; a structure ( 11 ) for joining to each other the plies ( 4, 8 ) exiting from the apparatus.

First claim

What is claimed is:

1 . A process for the production of a paper web, the process comprising:
independently embossing a first ply and a second ply to form a series of oppositely oriented reliefs on each of the first ply and the second ply and then joining the first ply and the second ply by nesting said oppositely oriented reliefs into each other and by gluing; forming a series of further reliefs on the second embossed ply, the further reliefs being oppositely oriented with respect to said reliefs previously formed on the second ply, creating on the second ply, a step being formed between each further relief and a corresponding relief produced by means of a second embossing unit, wherein glue is distributed on said further reliefs, and the glue distributed on said further reliefs is the same glue used for gluing the first ply and the second ply.

2 . A process according to claim 1 , wherein said glue is colored.

3 . A process according to claim 1 , further comprising:
providing a first embossing unit with a first embossing cylinder and a corresponding counter-cylinder for embossing the first ply; providing said second embossing unit with a second embossing cylinder and a corresponding counter-cylinder for embossing the second ply, such that, once embossed, said first ply and said second ply have said series of said oppositely oriented reliefs, said first embossing unit and said second embossing unit being synchronized to nest said oppositely oriented reliefs into each other; providing a sizing unit associated with said first embossing cylinder to distribute a predetermined amount of said glue on a side of the second ply opposed to that from which respective reliefs emerge; providing a means for joining to each other the first paper ply and the second paper ply; providing a means for forming, on said second paper ply, said series of further reliefs, creating on the second ply, said step between said each further relief and said corresponding relief produced by means of the second embossing unit.

4 . A process according to claim 1 , wherein a height of said further reliefs is comprised between 0.25 and 0.34 mm.

5 . A process according to claim 2 , wherein a height of said further reliefs is comprised between 0.25 and 0.34 mm.

6 . A process according to claim 3 , wherein a height of said further reliefs is comprised between 0.25 and 0.34 mm.

7 . A process for the production of a paper web, the process comprising:
providing a first embossing unit comprising a first embossing cylinder and a corresponding counter-cylinder; embossing a first paper ply with said first embossing unit such that said first paper ply comprises a plurality of first paper ply reliefs, each of said first paper ply reliefs comprising a first paper ply relief first lateral portion, a first paper ply relief second lateral portion and a first paper ply relief upper portion, said first paper ply relief first lateral portion being connected to said first paper ply relief second lateral portion via said first paper ply relief upper portion; providing a second embossing unit comprising a second embossing cylinder and a corresponding counter-cylinder; embossing a second paper ply with said second embossing unit such that said second paper ply comprises a plurality of second paper ply reliefs, each of said plurality of second paper ply reliefs comprising a second paper ply relief first lateral portion, a second paper ply relief second lateral portion and a second paper ply relief upper portion, each of said second paper ply relief first lateral portion and said second paper ply relief second lateral portion comprising a first end portion and a second end portion, said first end portion being located at a spaced location from said second end portion, said first end portion being located directly adjacent to said second paper ply relief upper portion, said second paper ply relief first lateral portion being connected to said second paper ply relief second lateral portion via said second paper ply relief upper portion, said first embossing unit and said second embossing unit being synchronized such that each of said first paper ply reliefs is nested into one of said second paper ply reliefs; forming a series of further reliefs on said second ply after forming said second paper ply reliefs, said further reliefs being located opposite said second paper ply reliefs, each of said further reliefs comprising at least one second paper ply relief stepped portion, said at least one second paper ply relief stepped portion being located adjacent to said second end portion of one of said second paper ply relief first lateral portion and said second paper ply relief second lateral portion, wherein said at least one second paper ply relief stepped portion, said second paper ply relief first lateral portion, said second paper ply relief second lateral portion and said second paper ply relief upper portion are located between said first paper relief first lateral portion and said first paper relief second lateral portion.

8 . A process according to claim 7 , wherein a height of said further reliefs is comprised between 0.25 and 0.34 mm.

9 . A process for the production of a paper web, the process comprising:
providing a first embossing unit with a first embossing cylinder and a corresponding counter-cylinder for embossing a first paper ply; providing a second embossing unit with a second embossing cylinder and a corresponding counter-cylinder for embossing a second paper ply, such that, once embossed, said first paper ply and said second paper ply have a series of oppositely oriented reliefs, said first embossing unit and said second embossing unit being synchronized so that said oppositely oriented reliefs are nested into each other; forming, on said second paper ply, a series of further reliefs oppositely oriented with respect to said reliefs previously formed by the second embossing unit, such that a step is created on the second ply between each further relief and a corresponding relief produced via the second embossing unit.

10 . A process according to claim 9 , wherein a height of said further reliefs is comprised between 0.25 and 0.34 mm.

Assignees

• Futura Spa

Inventors

• Giurlani Giovacchino
• Petri Stefano

Classifications

• B31F2201/0787

  Applying adhesive · CPC title

• B31F2201/0761

  Multi-layered · CPC title

• Y10T156/1023

  Surface deformation only [e.g., embossing] · CPC title

• Y10T156/15

  Combined or convertible surface bonding means and/or assembly means · CPC title

• B31F2201/0764

  the layers being nested · CPC title