US 2018/0133999 A1 · APPARATUS AND PROCESS FOR THE PRODUCTION OF PAPER WEB MATERIAL

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 (R4, R8), the embossing units (1, 5) being synchronized so that the reliefs are nested into each other; a sizing unit (1C, 2C, 3C) 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 (R8) emerge; a structure (11) for joining to each other the plies (4, 8) exiting from the apparatus.

Claims10

Dependent claims

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.

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.

2 more elements

Dependencies are inferred from the claim text.

Apparatus and process for the production of paper web material

Life of this patent

Apparatus and process for the production of paper web material

Life of this patent

Abstract

Claims10