Packaging machines are often supplied with a web of packaging material of double width. During transport, the web of material (11) is sub-divided into two part webs (12,13) by means of a central longitudinal cut. The exact run of the web of material (11) and of the part webs (12,13) is monitored by edge-sensing members (21; 25,26). Any deviations from the correct position are transmitted as error signal to web-adjusting members (24; 27,28). These are each equipped with two deflecting rollers (32...

The specification discloses a method for laminating a synthetic film or sheet to a fibrous web. According to the method, a heat-softenable material is combined as a sheet, film, spray or powder with a continuous fibrous web in interfacial contact with fibers of the fibrous web to form a composite. The composite is then continuously conducted through an extended nip dryer where heat and pressure are applied to the composite to effect a substantial reduction in moisture content of the composite wh...

The present invention is generally directed to elastic nonwoven webs and films made from thermoplastic polymers. In particular, the present invention is directed to forming nonwoven webs and films from an elastomeric polymer and then cross-linking the polymer in order to improve the stretch characteristics of the article. Cross-linking also makes the article more temperature resistant. in one embodiment, the elastomeric polymer is a metallocene-catalyzed copolymer of polyethylene. Elastic layers...

Apparatus for treating material webs. For the purpose of treating material webs (10), especially drying them, these are acted on by a (heated) gaseous medium via slot nozzles (13, 14) in the area of a drying chamber (11). Depending on the operating conditions and the material web, the flow conditions of the gaseous medium must be capable of being adapted in the area of the material web, since the material web (10) may otherwise be adversely affected, for example as a result of an excessive suppl...

Apparatus and method for aligning webs, such as photographic film or paper, where the trailing edge of an expiring web is spliced to the lead edge of a fresh web. A supporting means having the fresh web thereon in a fixed position is caused to move by sensor means transmitting a signal corresponding to precise positioning of the expiring relative to the fixed position of the fresh web. According to the invention, a programmable controller is used to analyze the signals received from the sensors ...

An apparatus and method for increasing the heating efficiency of a nonwoven web using heated air are provided. A flow modifier including a turbulence inducing bar arrangement is positioned between the heated air supply and the nonwoven web. The flow modifier increases the turbulence of the heated air before it contacts the nonwoven web, resulting in more thorough penetration of the web by the air, and better convective heat transfer between the heated air and the nonwoven web.

The invention relates to a dryer apparatus for fiber webs (10), such as webs of natural fiber, synthetic fiber and the like. The apparatus comprises a rotating dryer cylinder (1), the interior of which is provided with elements (8) for injecting hot heat-transfer fluid against the inner cylinder surface and for discharging if from the cylinder interior. The invention relates also to a method for heating a cylinder by injecting hot heat-transfer fluid against the inner surface of the heating cyli...

Electrostatically charged nonwoven webs (fabrics) are used in displays, quilting, toys, and pattern making. The electrostatic charge causes the nonwoven webs to cling to cloth or paper without the need of pins or connectors. In pattern making the charged nonwoven web is detachably secured to a mastern pattern permitting the web to be marked and cut to form a specific sized pattern which is used to cut cloth in a selected size.

A paper web and method of making the paper web are disclosed. In one embodiment the paper web includes a continuous relatively thinner region and a plurality of discrete relatively thickner regions. The relatively thicker regions are disposed in the plane of the relatively thinner region. The paper web can have a relatively patterned face and a relatively smooth face. The paper structures can be dried relatively quickly and efficiently, and can provide enhanced absorbency and bulk density while ...

A device for connecting paper webs in a web-fed rotary printing press utilizes a pivotable support frame to move a paper web tension compensation device into a position against the paper web prior to a flying web splice. An upper roller on the compensation device applies pressure to the depleting web to adhere it to the new web while a lower roller on the compensation device moves away from the new paper roll to maintain the effective travel path of the depleting web constant so that the web's t...