Textiles: weaving – Fabrics – Pile
Reexamination Certificate
2001-02-15
2002-10-01
Falik, Andy (Department: 3765)
Textiles: weaving
Fabrics
Pile
C139S399000, C139S401000, C139S402000, C139S403000
Reexamination Certificate
active
06457490
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a method for manufacturing a loop pile fabric, whereby a backing fabric is woven out of backing warp yarns and backing weft yarns, and whereby loop warp yarns and loop weft yarns are so provided that loop warp yarns are alternately inwoven in the backing fabric and form a pile loop over at least one loop weft yarn running outside the backing fabric, and whereby the loop weft yarns are subsequently removed.
This invention also relates to a loop pile fabric comprising a backing fabric woven out of warp yarns and weft yarns, and at least one area in which loop warp yarns are alternately inwoven in the backing fabric and form a pile loop protruding from the backing fabric. In particular this invention relates to a loop pile fabric that is manufactured according to a method with the above mentioned characteristics.
Weaving such loop pile fabrics according to a weaving method with the above mentioned characteristics is known. According to a widely applied weaving method the loop weft yarns are inserted above a series of lancets that extend stationary in warp direction above the backing fabric. These lancets hold the loop weft yarns at a certain distance above the backing fabric with the result that the loop warp yarns passed over these loop weft yarns form pile loops which protrude from the backing fabric over a certain height. This pile loop height, which is determined by the distance between the top edges of the lancets and the backing fabric, is the same for all pile loops of the fabric.
In the Belgian patent publication no. 1010423A3 such a method is described according to which apart from the ordinary upright pile loops, left-directed and right-directed pile loops can also be formed by inweaving at various levels in the backing fabric the backing weft yarns inwoven in the backing fabric on both sides of the pile loops, with the purpose of bringing some more variation into the appearance of loop pile fabrics.
Through this method the possibility is available of weaving a loop pile fabric in which, according to a well-determined pattern, areas with left-directed pile loops, areas with right-directed pile loops and areas with upright pile loops occur. Such a loop pile fabric indeed has a more varied appearance than pile loop fabrics with only upright pile loops.
Providing areas without loops is furthermore also known, in order to bring more variation into these types of fabrics. Such areas are usually indicated by the technical term “carving areas”.
The possibilities of introducing variation into the appearance of loop pile fabrics, according to these known methods, anyhow remain rather limited. A purpose of this invention consists in providing a method with the characteristics mentioned in the first paragraph of this specification, which through simple measures succeeds in offering additional possibilities of bringing variation into the appearance of pile loop fabrics.
SUMMARY OF THE INVENTION
According to this invention the above mentioned objective is achieved by providing a method whereby first and second loop weft yarns with a different thickness are provided, so that pile loops of different height are formed.
For the sake of clarity it should be pointed out that, where in this specification and in the claims attached hereto “the height of a pile loop” is mentioned, is meant: the height over which that pile loop protrudes above the backing fabric.
A loop warp yarn that is passed around over a thick loop weft yarn forms a loop with a greater height than a loop warp yarn that is passed around over a thinner weft yarn. In this very simple to implement and inexpensive, but nevertheless particularly efficient manner pile loops with a different height are obtained in a loop pile fabric.
This method therefore enables first and second areas to be created in a loop pile fabric of which the respective pile loops have a different height. Because of this new possibilities are available during the weaving of loop pile fabrics for implementing a striking variation in the appearance of this fabric.
This possibility of implementing areas with pile loops of different height can of course also be applied in combination with one or several of the already existing possibilities, namely the creation of one or more areas without pile loops, with directed pile loops, or with upright pile loops.
According to a preferred method according to this invention subsequently a top part is removed from a number of pile loops, so that a fabric is formed in which both pile loops and cut pile occur.
In this specification and in the claims the term “cut pile” is used in the sense of a series of pile yarns protruding from the backing fabric which for example are anchored by inweaving in that backing fabric and of which each protruding part is the single end part of a pile yarn. This in contrast to a pile loop of which the part protruding from the backing fabric is a loop-shaped passed-around part of a pile yarn.
By removing the top part from a number of loops, for example by shearing these away, both areas with pile loops and areas with cut pile can be achieved in a same fabric. The areas with cut pile produce a velvet effect in the fabric. The yarn parts protruding from the backing fabric can be rather long so that a so-called high-pile velvet effect is obtained. The visible structure of an area with cut pile differs in very striking manner from the visible structure of an area with pile loops. By means of these very clear structure variations it is possible to manufacture loop pile fabrics which have a pronounced varied appearance along the pile side.
Preferably high and low pile loops are formed in the fabric, and the top parts of a number of high pile loops are removed. Because of the fact that the high pile loops protrude above the low pile loops it is very easy to remove a protruding top part thereof. This can be effected for example mechanically whereby the top part is automatically sheared away at a predetermined height.
The top parts of a number of high pile loops are moreover preferably removed so far that the upright pile yarns of the thus formed cut pile have almost the same height as the low pile loops of the fabric. In this manner a preferred fabric is obtained in which the cut pile yarns protrude over almost the same height above the backing fabric as the pile loops. From an aesthetic point of view such a fabric has the advantage that it has a same pile height both in the areas with pile loops and in the areas with cut pile.
According to a very preferred method high pile loops with a first height and low pile loops with a lesser second height are formed in the fabric, and afterward a top part is removed from all high pile loops so that the thus formed pile yarns have almost the same height as the low pile loops of the fabric.
With the method according to this invention preferably at least one area with pile loops and at least one area with cut pile is also formed according to a predetermined pattern or design.
According to this method in the fabric preferably at least one area with obliquely directed pile loops and/or at least one area without pile yarns is also formed.
According to a particularly preferred method according to this invention in the fabric, in an area where no pile loops are formed, effect backing weft yarns with laterally protruding filaments, in particular hairy backing weft yarns, are inwoven in the backing fabric.
Because of this the effect of low pile velvet is obtained in the loop pile fabric. This provides yet another visible structure in the fabric, with the result that the fabric obtains a still more varied appearance.
Through the above described cut pile a high-pile velvet effect is created. The effect backing weft yarns can produce a low-pile velvet effect in areas without pile loops. Furthermore the possibilities also exist of forming ordinary upright or left- or right-directed pile loops, and of forming areas without pile loops in which no low-pile velvet effect is created. All the possibilities of bringing variation
Dewispelaere Andre
Moulin Gilbert
Creighton Wray James
Falik Andy
Muromoto Jr. Robert H.
N.V. Michel Van de Wiele
Narasimhan Meera P.
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