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US 2009/0288757 A1Published application
Apparatus and method for carrying out a continued union of paper webs
OwnerFabio Periniinventor
Life of this patent
Estimating the term…
Abstract
Apparatus for continually joining paper webs, comprising a device able to compress the webs (5,6) onto an impression cylinder or roller (4) while the webs advance toward an outlet section of the apparatus. The compressive device includes a roller or cylinder (2) which exhibits a hard outer surface (20) supported by an underlying elastic surface (23).
Claims20
An apparatus for continually joining paper webs, the apparatus comprising:
- a compressing roller comprising a rigid cylinder, an elastic coating and a rigid outer surface structure, said elastic coating having an outer elastic surface and an inner elastic surface, said inner elastic surface engaging said rigid cylinder, said outer elastic surface being connected to said rigid outer surface structure, said elastic coating having an elastic coating hardness, said rigid outer surface structure having a rigid outer surface structure hardness, said rigid outer surface structure hardness being greater than said elastic coating hardness
- an impression cylinder, said impression cylinder having a surface defining one or more depressions;
- a first paper web;
- a second paper web, said compressing roller pressing said first paper web and said second paper web in a direction of said impression cylinder, said elastic coating supporting said rigid outer surface structure when said compressing roller presses said first paper web and said second paper web such that said rigid outer surface structure does not flexurally bend along an entire length thereof.
1 more element
A method for carrying out the union of two paper webs by a mutual compression of paper webs, the method comprising:
- providing a rigid cylinder;
- applying an elastic coating to said rigid cylinder and applying a rigid outer layer to said elastic coating to form a pressure roller;
- providing an impression roller having an impression roller outer surface defining one or more depressions;
- passing a first paper web and a second paper web between said pressure roller and said impression roller;
- pressing said first paper web and said second paper web in a direction of said impression roller with said pressure roller such that said rigid outer layer does not bend flexurally in a radial direction of said pressure roller along an entire length thereof via said elastic coating.
2 more elements
An apparatus for continually joining paper webs, the apparatus comprising:
- a plurality of paper webs comprising at least a first paper web and a second paper web;
- an impression roller having an outer impression roller surface defining a plurality of impression roller surface projections and a plurality of surface depressions, each of said depressions being located adjacent to one of said roller surface projections;
- a compressing roller having a hardened outer surface and an elastic inner surface, said hardened outer surface being composed of steel, said hardened outer surface being located opposite said elastic inner surface, said impression roller and said compressing roller defining an outlet section, wherein a portion of said first paper web and a portion of said second paper web are located within said outlet section, said compressing roller compressing said portion of said first paper web and said portion of said second paper web in a direction of said impression roller to form a continuous paper web, wherein said elastic inner surface supports said hardened outer surface such that said hardened outer surface does not bend in a radial direction of said compressing roller.
Dependencies are inferred from the claim text.