EP0534515B1 - Method for weaving face-to-face Jacquard pile fabrics - Google Patents

Method for weaving face-to-face Jacquard pile fabrics

Info

Publication number
EP0534515B1
EP0534515B1 EP19920202605 EP92202605A EP0534515B1 EP 0534515 B1 EP0534515 B1 EP 0534515B1 EP 19920202605 EP19920202605 EP 19920202605 EP 92202605 A EP92202605 A EP 92202605A EP 0534515 B1 EP0534515 B1 EP 0534515B1
Authority
EP
European Patent Office
Prior art keywords
pile
transition
cycle
becomes
wefts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19920202605
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0534515A1 (en
Inventor
Jan Vererfve
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VERERFVE NV
Original Assignee
VERERFVE NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VERERFVE NV filed Critical VERERFVE NV
Publication of EP0534515A1 publication Critical patent/EP0534515A1/en
Application granted granted Critical
Publication of EP0534515B1 publication Critical patent/EP0534515B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D27/00—Woven pile fabrics
    • D03D27/02—Woven pile fabrics wherein the pile is formed by warp or weft
    • D03D27/10—Fabrics woven face-to-face, e.g. double velvet

Definitions

  • the invention relates to an improved method for weaving face-to-face Jacquard pile fabrics.
  • a backing fabric is woven by weaving weft ends and warp ends on two levels one above the other.
  • the warp ends of this backing fabric consist of tight warp ends and loose warp ends.
  • Pile ends are woven into these backing fabrics at the same time.
  • the pile of the fabrics is formed.
  • the face-to-face is separated into its two parts, by cutting through the pile ends which run between both backing fabrics.
  • These two fabrics are called the upper fabric and the lower fabric.
  • the back of the upper fabric is formed by the top of the upper backing fabric, the back of the lower fabric by the underside of the lower backing fabric.
  • the pile side of both fabrics is formed on the side directed towards each other of the upper and the lower backing fabric.
  • This choice is essentially determined by the pattern which is desired to be formed in the fabrics.
  • a specific pile end is allowed to form pile if the color of that pile end is needed for the pattern.
  • Another pile end, of which the color has already been used earlier and/or will be further needed and is not needed in a specific place in the pattern, is allowed to run preferably invisibly on the pile side, parallel to the upper or lower backing fabric.
  • a combination of a weft in the lower fabric and a weft in the upper fabric, whereby, pile is formed by a pile end, is called a pile point.
  • a pile point thus consists - in total for the face-to-face - of two wefts, or 1 weft per fabric.
  • the pile forming pile ends are called active pile ends or active pile.
  • the other pile ends, which at a specific place do not participate in forming the pattern, are then called the dead pile ends or dead pile.
  • the dead pile ends can be woven into the backing fabrics or not. If the dead pile is not woven-in during weaving this remains on the underside of the lower backing fabric or on the top of the upper backing fabric, and is later removed. When the dead pile ends are however woven-in it will of course be attempted to weave these in (on to pile side) as invisibly as possible. It is a known method to solve this problem by weaving-in the dead pile ends, forming a smooth surface with the tight warp ends. Moreover these dead pile ends are proportionally distributed or otherwise between the upper piece and the lower piece.
  • each fabric can also play a role with the choice of the manner in which, and in which fabric a dead pile end is woven-in.
  • the position of the possibly different pile ends in each of the fabrics is determined with each weft, in function of the desired pattern, (by allowing certain pile ends to form pile with certain wefts and other pile ends not), in function of the choice of whether to weave-in the pile ends or not, and in function of the desired weave.
  • Such jacquard devices essentially consist of positioning means for the various pile ends, a control device for these positioning means, and a data processing device which can pass on the input data with each weft and for each pile end to the aforementioned control device.
  • a data processing device can operate mechanically, electronically or electromechanically, or can be a computer.
  • the desired characteristics of the fabric and of the pattern are translated into data, which are put into such a device, are processed, and are finally passed on via the control device to the positioning means and are converted into pile end positions.
  • the aforementioned data are placed on suitable data carriers for their input into the data processing device. With the use of a computer the processing of the data is possibly effected with the assistance of suitable software.
  • the successive wefts can possibly also occur in reverse succession ( wefts (4), (3), (2), (1) ), or the succession can be shifted for example consecutive wefts (3), (4), (2), (1).
  • Such variants can finally all be repeated up to the first mentioned background weave, shown in figure 1.
  • the effect of the loose warp ends (7) and (8) is of secondary importance and will not be discussed in this description, and no longer be indicated in the following figures (as from figure 2), for the sake of the clarity of the figures.
  • the dead pile ends are woven-in, running parallel to one of the tight warp ends (5) or (6).
  • Pile end (23) is woven into the upper fabric the time before by the weft (14), and is woven into the lower fabric the first time by weft (17).
  • Pile end (24) is the time before woven into the upper fabric by weft (16), and the first time in the lower fabric, by weft (19).
  • Pile end (24) is visible there on the pile side between two pile points - wefts (17) and (19) - where pile end (23) has formed pile.
  • pile end (23) has formed pile.
  • a tuft of a pile end (24) with another color becomes visible on the pile side. Since the formation of a sharply defined pattern is one of the objectives with jacquard weaving such an effect is highly undesirable.
  • transition of the pattern or design transition from active pile to dead pile of a pile end, and the other way around
  • effects also develop which are detrimental to the good appearance of the back of the fabric. It can after all also be an objective to make the woven pattern as truly visible as possible on the back of the fabric.
  • FIG. 3b Such an example is shown in figure 3b.
  • the background weave again has a repeat over 4 picks (31), (32), (33), (34).
  • the pile end (40) initially forms pile. After the second weft (32) this pile end (40) is to change over from active pile to dead pile, woven into the upper fabric, and this pile end (40) is again to form pile on the seventh weft (37).
  • This pile end (40) will be above the fourth weft (34) and thereafter extend toward the lower fabric in order to be woven-in under the seventh weft (37) and further to form pile with the wefts (38), and the following ones.
  • the undesired effect consists in that, on the back of the upper fabric, at the location of weft (34), pile end (40) is visible, while this forms no pile there (not included in the figure). This is to be avoided because the appearance of the back in this manner no longer corresponds to the pattern formed on the pile side.
  • This invention more particularly relates to an improved method for weaving face-to-face Jacquard pile fabrics with woven-in pile ends and with a background weave which has a repeat of 4 picks.
  • the invention is intended to provide such a method with which it becomes possible to have the pattern of the pile fabrics change with every pile point, while the undesired effects - when changing the effect of a pile end with certain wefts of the repeat - on the back and/or on the pile side of the fabrics, are avoided.
  • the purpose of the invention is more specifically to provide a method for weaving such face-to-face fabrics, through which it becomes possible to form patterns with a minimum detail of one pile point, without undesired effects on the pile side and/or the back of the fabrics.
  • Another object of the invention consists of pile fabrics which are woven according to one of the methods according to the invention.
  • the method according to the invention therefore consists of two series of transitional weaves.
  • the purpose of the first series of transitional weaves consists of avoiding the detrimental effects with certain transitions which produce these detrimental effects, whereby - if it is impossible to avoid the detrimental effects on the pile side and the back at the same time - preference is given to the elimination of the detrimental effects on the pile side.
  • the method according to the invention is characterized in that to begin with, all possible situations are considered for the effect of a pile end, in a cycle of 4 wefts. For the simplification of the description, a status code is given to each of these situations.
  • the various possible situations with their respective status code are the following:
  • the method according to the invention is characterized in that those transitions between two of the above mentioned situations, where a detrimental effect occurs, a changed weave for the pile end is prescribed.
  • This changed weave is the same for the first series of transitional weaves (preference for good pile side) as for the second series of transitional weaves (preference for good back), in the cases where the detrimental effects on the pile side and on the back can be avoided at the same time for that same changed weave.
  • the changed weave for a same transition differs, depending on whether it belongs to the first or to the second series of transitional weaves.
  • action codes are indicated by so-called action codes, and are the following:
  • the first two wefts of each cycle are above the respective warp ends in both fabrics, the last two wefts under these warp ends.
  • the prescribed actions only relate to the last two wefts of the first (old) cycle and to the first two wefts of the second (new) cycle.
  • the first half of the first cycle and the second half of the second cycle are after all part of other transitions, respectively between the cycle which precedes the aforementioned first cycle and that first cycle and between the second cycle and the cycle which follows it.
  • the method according to the invention is further characterized in that the first series of changed weaves prescribe, for each possible transition between cycles of 4 wefts in which according to the known method a detrimental effect occurs on the pile side of at least one of the fabrics, a specific "action" which solves at least that detrimental effect on the pile side, and that the second series of changed weaves prescribe, for each transition in which according to the known method a detrimental effect occurs on the back of at least one of the fabrics, a specific "action", which solves at least that detrimental effect on the back.
  • Figures 4a up to and including 4y are longitudinal cross-sections of a face-to-face fabric with woven-in dead pile, over two cycles of 4 wefts whereby the possible and significant transitions in the effect of a pile end are indicated in the various figures - after a pile point which does not form the end of a repeat - according to the known method (dashed line), and according to the method according to the invention (full lines) whereby preference is given to the elimination of the detrimental effects on the pile side of the fabrics.
  • Figures 5a up to and including 5y are longitudinal cross-sections of a face-to-face fabric with woven-in dead pile, over two cycles of 4 wefts whereby the possible and significant transitions in the effect of a pile end are indicated in the various figures - after a pile point which does not form the end of a repeat - according to the known method (dashed line), and according to the method according to the invention (full lines) whereby preference is given to the elimination of the detrimental effects on the back of the fabrics.
  • figures 4a up to an including 4y respectively figures 5a up to and including 5y show the transitions between situations for the pile end with the following status codes:
  • Figure 6 is a table in which, for each transition from a first situation (I) to a second situation (II), the letter of the figure (from figures 4a up to and including 4y and 5a up to and including 5y) which illustrates this transition, is indicated in the box at the intersection of the respective column and row.
  • Figure 7 is a table, in which for the transitional weaves with preference for a good pile side the actions (indicated by their codes) provided according to the method according to the invention can be read off in function of the situation of a pile end in a first cycle of 4 picks (indicated by the status codes) and the following situation of that pile end in a second cycle (II) of 4 picks (indicated by means of status codes).
  • the situation of the pile end in the first cycle is read off in the columns, the situation of the pile end in the second cycle in the rows.
  • Figure 8 is a table, in which for the transitional weaves with preference for a good back the actions (indicated by their action codes) provided according to the method according to the invention can be read off in function of the situation of a pile end in a first cycle of 4 picks (indicated by the status codes) and the following situation of that pile end in a second cycle (II) of 4 picks (indicated by means of status codes).
  • the situation of the pile end in the first cycle (I) is read off in the columns, the situation of the pile end in the second cycle (II) in the rows.
  • the method according to the invention is characterized in that in a first step all possible transitions in the effect of a specific pile end, which do not take place after one repeat of 4 picks, are considered as the transition between two cycles of 4 picks, whereby the pile end in each of these cycles has a well defined effect.
  • the number of possible situations is seven and is indicated by the status codes as described above: 0, 1(O), 1(B), 2(O), 2(B), 3, and 4.
  • the first weft (41) of the first cycle is above the tight warp end (49) in the lower fabric, the second weft end (42) of the first cycle above the tight warp end (50) in the upper fabric, the third weft end (43) of the first cycle under the tight warp end (49) in the lower fabric, the fourth weft end (44) of the first cycle under the tight warp end (50) in the lower fabric.
  • This position of the weft ends (45), (46), (47) and (48) in relation to the tight warp ends (49) and (50) in the lower fabric, respectively in the upper fabric, is repeated in the second cycle.
  • transitions where the method according to the invention is applied in order to rectify detrimental effects, on the pile side - by the formation of so-called bridges on the back - and 2 transitions where the method according to the invention is applied in order to improve the back, without the pile side suffering damage.
  • transitional weaves according to the invention which develop through the - per case - application of the respectively prescribed actions, according to the invention, therefore form the first series of transitional weaves, which are used if the good quality of the pile side is set as priority.
  • the objective of the actions according to the invention is in each case to avoid a pile forming pile end (51) from being visible on the back, and to avoid a dead pile end (51) from being visible on the back.
  • the method according to the invention can in practice be applied through effect on the jacquard device which determines the positions of the pile ends in the fabrics. More specifically, with use of a computer as data processing device of the jacquard device, a software program can be developed which adapts the input data for the positions of the pile ends, when a transition occurs, which could give rise to a detrimental effect. The various possible situations and the various transitions, are then also read into the computer.
  • the advantage of the method according to the invention lies in the fact that in the face-to-face fabrics considered here the transition of a specific pile end, from one situation to another for its effect in the fabrics, can be allowed to occur with whatever pile point, and moreover it can be avoided that detrimental effects occur either on the back of the fabrics, or on the pile side thereof, (or on both sides of the fabrics at the same time), which is unavoidable according to the known method, when the transition is allowed to take place with a weft which does not form the end of a repeat.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Woven Fabrics (AREA)
  • Looms (AREA)
EP19920202605 1991-08-28 1992-08-27 Method for weaving face-to-face Jacquard pile fabrics Expired - Lifetime EP0534515B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9100802A BE1005208A4 (nl) 1991-08-28 1991-08-28 Werkwijze voor het weven van dubbelstuk jacquardpoolweefsels, en volgens een dergelijke werkwijze vervaardigde poolweefsels.
BE9100802 1991-08-28

Publications (2)

Publication Number Publication Date
EP0534515A1 EP0534515A1 (en) 1993-03-31
EP0534515B1 true EP0534515B1 (en) 1997-05-21

Family

ID=3885676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920202605 Expired - Lifetime EP0534515B1 (en) 1991-08-28 1992-08-27 Method for weaving face-to-face Jacquard pile fabrics

Country Status (5)

Country Link
EP (1) EP0534515B1 (xx)
BE (1) BE1005208A4 (xx)
DE (1) DE69219845T2 (xx)
EG (1) EG19466A (xx)
TR (1) TR26645A (xx)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011689A5 (nl) * 1997-12-29 1999-12-07 Wiele Michel Van De Nv Werkwijze voor het weven van een poolweefsel met toepassing van bindingscorrecties.
BE1012366A3 (nl) * 1998-12-23 2000-10-03 Wiele Michel Van De Nv Werkwijze voor het weven van een onecht boucle-weefsel.
BE1013266A3 (nl) * 2000-02-02 2001-11-06 Wiele Michel Van De Nv Werkwijze voor het vervaardigen van een hoogkorig poolweefsel.
BE1016943A6 (nl) * 2006-01-13 2007-10-02 Wiele Michel Van De Nv Werkwijze voor het vermijden van mengcontouren in poolweefsels.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE896102A (nl) * 1983-03-08 1983-07-01 Tapijtenweverij Nv Speciale werkwijze voor het weven van dubbelspoelige ingebonden dubbelstuktapijten met doorgeweven tekening
BE1004348A3 (nl) * 1990-06-05 1992-11-03 Wiele Michel Van De Nv Werkwijze voor het vervaardigen van een dubbelstuktapijtweefsel, in een 2-schotbinding alsmede aldus verkregen weefsels.

Also Published As

Publication number Publication date
DE69219845T2 (de) 1997-09-11
DE69219845D1 (de) 1997-06-26
EP0534515A1 (en) 1993-03-31
EG19466A (en) 1995-08-30
BE1005208A4 (nl) 1993-05-25
TR26645A (tr) 1995-03-15

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