US 6,112,773 AGranted

Method and loom for weaving first and/or second pile lengths while weaving terry fabric

AssigneeLindauer Dornier Gesellschaft mbH

InventorErwin Geiger

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Abstract

Two different pile heights (a, b) can be selectively formed during the weaving of terry fabric on a loom by shifting the fabric with its actual beat-up line (10a) back and forth relative to a base beat-up line (3). First and second fabric shifting oscillating motions are performed by first and second power or motion transmission couplings (4, 11) driven through eccentric drives (5, 12) from a main loom drive shaft (DS) and controlled through valves by a central loom control (22) in such a way that a second oscillation with a different amplitude is superimposed on a first oscillation between beat-up groups of weft beat-up motions including partial weft beat-ups and a full weft beat-up motion of a reed (2) in the loom. Different oscillation amplitudes cause a beat-up line shift of different length (a or b) whereby different pile heights are formed.

Claims15

Dependent claims

A method for weaving terry fabric having selectively first and second different pile lengths, comprising the following steps:

(a) performing a first weaving motion sequence of first weaving steps including weft thread beat-up motions;
(b) first shifting a movable weft beat-up line (10a) of said terry fabric (10) during said first motion sequence by imposing first oscillating back and forth motions on said terry fabric (10) relative to a beat-up base line (3) between said first weaving steps;
(c) controlling an amplitude of said first oscillating back and forth motions to form a first shifting length (a) which provides a respective first pile length;
(d) performing a second weaving motion sequence of second weaving steps including weft thread beat-up motions;
(e) second shifting said movable weft beat-up line (10a) of said terry fabric (10) by imposing second oscillating back and forth motions on said terry fabric (10) relative to said beat-up base line (3) between said second weaving steps;
(f) further controlling an amplitude of said second oscillating back and forth motions to form a second shifting length (b) which provides a respective second pile length;
and
(g) superimposing said second weaving motion sequence on said first weaving motion sequence for producing said two different pile lengths.

5 more elements

A terry fabric weaving loom, said weaving loom comprising in combination a main loom drive shaft (DS), a rotatably mounted fabric take-up roller (1), a reed (2) for performing full and partial weft beat-up motions, a first motion transmission coupling (4), a first eccentric cam drive (5) driven through said main loom drive shaft (DS) and operatively connected to said first motion transmission coupling (4), first coupling links (7, 8, 9) linking said first motion transmission coupling (4) to said take-up roller (1) for shifting a movable weft beat-up line (10a) of said terry fabric (10) relative to a beat-up base line (3) back and forth by a first shifting length (a) which provides a respective first pile length, said apparatus further comprising a second motion transmission coupling (11), a second eccentric cam drive (12) driven through said main loom drive shaft (DS) and operatively connected to said second motion transmission coupling (11), a motion superimposing mechanism comprising second coupling links (14, 15, 16) linking said second motion transmission coupling (11) to said first power transmission coupling (4) for superimposing motions of said second motion transmission coupling (11) on motions of said first motion transmission coupling (4) so that said fabric take-up roller (1) shifts said movable beat-up line (10a) relative to said beat-up base line (3) back and forth by a second shifting length (b), said second length (b) providing a respective different pile length when said first and second lower transmission couplings are actively driven by said first and second eccentric cam drives (5, 12).

Dependencies are inferred from the claim text.