E.i. Dupont De Nemours and Company

Dupont Teijin Films U.S. Limited Partnership

Dupont Teijin Films U.S. Ltd.

Du Pont Teijin Films Uk, Ltd.

Gilles Petitjean

Luc Marie Hubert Andre Nicolai

Jean-Luc Verheggen

Bert Van Den Bedem

Joseph Aloyse Marnach

Jos Marnach

Nicolas Rollinger

The invention relates to an apparatus for cutting of a web () conveyed along a conveyance direction (F), and subsequent feeding and threading it up into a processing line, said web () comprising a central portion () and edges (), said apparatus comprising central cutting means () for cutting the central portion () laterally and transversely to the conveyance direction (F) and edge cutting means () for cutting the edges () transversely to the conveyance direction (F), said apparatus further comprising edge channels () for taking up the edges () into the processing line, said channels being substantially closed and comprising movable lids. The invention also provides a method for threading up a web in a processing line. The invention finally provides edge channels ().

Apparatus and method for cutting a web, feeding it into a processing and threading it up through that line

A segmented vacuum roll comprising an inner assembly on which a plurality of cylindrical sleeve tubes ( ) having apertures over their circumference are rotatably and coaxially mounted side by side, each of said sleeve tubes being individually rotatable and one or several first chambers ( ) formed in said inner assembly and partly defined by a first portion of circumference of said sleeve tubes, said inner assembly comprising linking channels ( ) for linking a vacuum source to said chambers so that said first portion of circumference of said sleeve tubes may be submitted to vacuum. Said inner assembly comprises an inner tube ( ), at least one outer tube ( ) surrounding said inner tube and a plurality of longitudinal walls extending between said inner tube and said outer tube so as to form longitudinal channels ( ).

Segmented vacuum roll

The invention relates to a cutting assembly for use in thin and ultrathin web winding stations. It also relates to a method for cutting a web using this cutting assembly. According to the invention, the web ( ) is cut by a blade ( ) with a cutting edge transverse to the web transfer direction; the blade moves between a rearward position and a forward position; in the forward position, the cutting edge is substantially parallel to an axis of the roll ( ) receiving the web, and the blade is substantially tangent to a surface of the roll. For cutting the web, the blade is moved from its rearward position to its forward position, so that its speed at the time it engages with said web is at least substantially equal to the speed of the web. This ensures a clean and clear cut of the web. At the same time, it ensures that the leading edge of the web is smoothly and evenly placed on the roll, without any creasing nor folding of the web.

High speed cutting assembly

Apparatus for automatic high-speed winding of a continuous web of thin film-like material onto a core to form a wound roll, in which the film is applied by a train of idling lay-on rolls consisting of first and second rolls arranged parallel to the said core and which, in the production position are applied against the roll being wound by use of a pneumatic cylinder having a movable piston situated at each end of each roll and each acting on a respective pivoting arm one end of which carries a bearing on which the rolls are journaled and the other end of which pivots on a carriage that can be advanced and retracted along a guide path, enabling perfectly uniform wound rolls to be obtained.

Method and apparatus for winding a web

A device is disclosed for handling webs of material by hydrostatic support comprising (a) adjacent bearing bars, having arcuate, smooth surfaces, and being holefree at lines of web proximity, (b) a pressure chamber between the bearing bars and open to the arcuate surfaces, and (c) fluid supply means to the pressure chamber.

Growing community of inventors

Arlon, Belgium

Gilles Petitjean