GB2099686A

GB2099686A - Method and apparatus for manufacturing two-wing dress shielding elements

Info

Publication number: GB2099686A
Application number: GB8216257A
Authority: GB
Original assignee: William Prym Werke GmbH and Co KG
Current assignee: William Prym Werke GmbH and Co KG
Priority date: 1981-06-05
Filing date: 1982-06-03
Publication date: 1982-12-15
Also published as: DE3122343A1; FR2507065B2; FR2507065A2; GB2099686B

Abstract

A method of and apparatus for manufacturing two-wing one-piece dress-shielding elements includes supplying two partial webs 2', 2'' each from respective upper and lower supply rolls 1', 1'' attaching to each of the partial webs a piece of adhesive material 6 coated with paper to keep them inactive, applying the partial webs with the attached adhesive pieces to one another so as to form a doubled web 4, welding the partial webs of the doubled web to one another along an upper edge 8 of a dress-shielding element at a welding station 7, stamping out the dress- shielding element at a stamping station 9 while retaining small connecting lands, releasing the dress- shielding element from the doubled web at a transfer station 10 and sealing a covering strip 14 to the dress-shielding element by the use of sealing and clamping jaws 17. <IMAGE>

Description

SPECIFICATION Method and apparatus for manufacturing twowing dress-shielding elements The present invention relates to a method of and an arrangement for manufacturing two-wing dress-shielding elements, preferably disposable and/or one piece elements.

Methods of the above mentioned general type are known in the art. One such method is disclosed, for example, in British patent application No. 81.11844 published under No.

2074844'A'. The method and arrangement disclosed in this reference include displacement of a foil-like initial material from supply means between individual successively arranged working stations so that the initial material serves as a transporting means for dress-shielding elements to be manufactured from this material. In the above-described method, not only the waste part is reduced, but also a considerable simplification of the manufacturing tools and a greater working speed are achieved.

The present invention seeks further to reduce the manufacturing costs of the dress-shielding element.

According to one aspect of the present invention there is provided a method of manufacturing two-wing dress-shielding elements by displacing a web of material composed of a weldable synthetic plastics foil and a fleece layer between a plurality of working stations so that the web serves as transporting means for the dressshielding elements to be manufactured from the web, comprising supplying two partial webs each from a respective, e.g. an upper and a lower supply means; attaching to each of the partial webs a piece of covered-over adhesive material, after leaving the supply means; applying the partial webs with the attached pieces of adhesive material to one another so as to form a doubled web; welding the partial webs of the doubled web with one another along an upper curved edge of the dress-shielding element, stamping out the dress-shielding element after welding while retaining small connecting lands with the web; and thereafter sealing a covering strip to the dress-shielding elements and releasing the latter from the doubled web simultaneously or in any desired sequence.

According to another aspect of the present invention, there is provided apparatus for manufacturing a two-wing dress-shielding element, comprising means for displacing a web of material composed of a weldable synthetic plastics foil and a fleece layer between a plurality of working stations so that the web serves as transporting means for the dress-shielding element to be manufactured from the web, the apparatus including means for supplying two partial webs, e.g. an upper and a lower supply element; means for attaching to each of the partial webs covered-over adhesive material after leaving the supply means; means for applying the partial webs to one another so as to form a doubled web; means for welding the partial webs together along a curved line destined to be the upper curved edge of a dress-shielding element; means for stamping out the dress-shielding element after welding, while retaining small connecting lands; means for releasing the dress-shielding element from the doubled web; and means for sealing a covering strip to the dress-shielding element.

The invention furthermore includes a twowinged dress-shielding element whenever made by the method and/or the apparatus set forth above.

When the method is performed and the apparatus is designed in accordance with the present invention, the manufacturing costs of twowing disposable dress-shielding elements are considerably reduced. The utilisation of the upper and lower supply means or supply rollers has a particular importance since it allows one not only to dispense with a special folding station, but also to simplify the subsequent welding step.

Preferably the seam resulting from the welding together of the partial webs and the stamping cut extend along lines defined by the two tips of the dress-shielding element transversely to the doubled web. This arrangement of the welding seam and the stamping cut transverse to the web assures a reduction of the waste portion.

The invention is described, merely by way of example with reference to the accompanying purely schematic drawing, the single Figure of which is a diagrammatic layout illustrating a method of and apparatus for manufacturing twowing disposable dress-shielding elements.

In the Figure the starting material for manufacturing two-wing one-piece dress shielding elements is a composite foil composed of a fleece layer which is fixedly connected with a weldable synthetic plastics foil. The starting material is fed in two parts from an upper supply roller 1' and a lower supply roller 1" into a manufacturing path.

The two partial webs 2' and 2" are pulled from their respective supply rollers cyclically. The drive of the partial webs is performed by a feeding roller 11 of a transfer station 10 which will be described hereinbelow. Expediently, a pair of rollers 3 which may naturally be also used for driving both partial webs, control the running of the partial webs and in particular any deviation of the upper partial web 2' and the lower partial web 2" from a working plane, as well as the guiding of the two partial webs to one another so as to form a doubled web of material 4 so that their synthetic plastics sides come to lie adjacently on each other.

Prior to arrival of both partial webs 2' and 2" in the region of the rollers 3, small pieces 6 of an unsupported adhesive material are attached at the synthetic plastics side of the partial webs. The pieces 6 are fed from upper and lower glueing rollers 5' and 5" respectively, and their free side is provided with readily removable coating paper.In the doubled web 4 exiting from the rollers 3 the adhesive pieces 6 are not activated because of the coating paper, so that the two partial webs 2' and 2" in the doubled web 4 lie closely next to one another without, however, being glued to one another After leaving the rollers 3, the doubled web 4 travels to the working region of a welding station 7 in which a welding electrode shaped in accordance with an upper bent edge 8 of the dress-shielding element welds the two partial webs 2' and 2" together along a correspondingly curved line. In a following stamping station 9 the dress-shielding element is stamped out from the doubled web 4 by a suitable designed cutting die so as to leave small connecting locations or "lands".The remaining connecting lands serve the purpose of retaining the driving connection of the doubled web to the end of the manufacturing path. The welding station 7 and the stamping station 9 are arranged relative to the doubled web 4 so that the upper edge 8 of the dress-shielding element extends transversely to the web 4.

The manufacturing path has a transfer station which is designated, as a whole, by reference numeral 10 and is located downstream of the stamping station 9. The transfer station 10 includes a driven feeding roller 11, a removing roller 12 which rotates in a direction opposite to the direction of rotation of the feeding roller 11, a supply roller 1 5 and a cutting and dispensing element 1 6 for a covering strip 1 4 to be placed on the welded edge 8 of the dress-shielding element.

The feeding roller 11 of the transfer station 10 is provided on its periphery with a plurality of pressing projections 13 which are suitable for pressing out the dress-shielding elements which are retained weakly on the web 4 only by the small connection lands. Thereby the dressshielding elements are finally separated in the region of the feeding roller 11 from the doubled web. The removing roller 12 operated in synchronism with the feeding roller 11, has at its periphery a plurality of holding clamps 1 7 in which the cut covering strips 14 are introduced at suitable locations.The covering strips 14 are pulled in a cyclically co-ordinated manner from the supply roller 1 5 and cut in the dispensing element 1 6 to the respective length to be ready for transfer onto the removing roller 12.

Each clamp 1 7 filled with a covering strip 14 moves during rotation of the removing roller 12 towards the feeding roller 11 and the curved welding edge 8 of the protruding dress-shielding element. Thus, the welding edge 8 also comes to lie in the clamp 1 7 and so that the covering strip 14 straddles the welding edge 8. The clamp is then closed and heated so that the covering strip 14 is sealed together with the dress-shielding element. During further rotation, the removing roller 12 breaks the weak connection between the dress-shielding element and the doubled web, then the clamp 1 7 is opened and the finished dress-shielding element is released for a nonillustrated packaging station. Control of the clamp 17 and the sealing heating is performed automatically, for example by switching cams.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.

Claims

1. A method of manufacturing two wing dressshielding elements by displacing a web of material composed of a weldable synthetic plastics foil and a fleece layer between a plurality of working stations so that the web serves as transporting means for the dress-shielding elements to be manufactured from the web, comprising supplying two partial webs each from a respective, e.g. an upper and lower supply means; attaching to each of the partial webs a piece of covered-over adhesive material, after leaving the supply means; applying the partial webs with the attached pieces of adhesive material to one another so as to form a doubled web; welding the partial webs of the doubled web with one another along an upper curved edge of the dress-shielding element, stamping out the dress-shielding element after welding while retaining small connecting lands with the web; and thereafter sealing a covering strip to the dress-shielding elements and releasing the latter from the doubled web simultaneously or in any desired sequence.

2. A method as claimed in claim 1 , wherein said applying step includes juxtaposing the partial webs with their plastics foil faces next to each other by a pair of web movement controlling rollers.

3. A method as claimed in claim 1 or 2, wherein the seam resulting from the welding together of the partial webs and the stamping cut extend along lines defined by the two tips of the dressshielding element transversely to the doubled web.

4. A method as claimed in claim 1 substantially as herein described with reference to and as shown in the accompanying drawing.

5. Apparatus for manufacturing a two-wing dress-shielding element, comprising means for displacing a web of material composed of a weldable synthetic plastics foil and a fleece layer between a plurality of working stations so that the web serves as transporting means for the dressshielding element to be manufactured from the web, the apparatus including means for supplying two partial webs, e.g. an upper and a lower supply element; means for attaching to each of the partial webs covered-over adhesive material after leaving the supply means; means for applying the partial webs to one another so as to form a doubled web; means for welding the partial webs together along a curved line destined to be the upper curved edge of a dress-shielding element; means for stamping out the dress-shielding element after welding, while retaining small connecting lands; means for releasing the dress-shielding element from the doubled web; and means for sealing a covering strip to the dress-shielding element.

6. Apparatus according to claim 5, wherein the releasing means and the sealing means are disposed at a transfer station in the form of a pair of contrarotating rolling elements around one of which the web is moved while the other is provided with a plurality of angularly spaced apart peripheral heating and clamping jaws adapted to co-operate with a covering strip dispenser to receive a said strip in each pair of jaws and thereafter to receive, clamp and break off from the web a dress-shielding element, seal it together with the strip and then to release it.

7. Apparatus according to claim 5, substantially as herein described with reference to and as shown in the accompanying drawing.

8. A dress shielding element whenever made by the method and/or the apparatus claimed in any preceding claim.