Abstract: A warp knitted fabric includes a set of non-elastomeric yarn of substantially the same type, fully threaded from a guide bar at the front side of the Tricot type warp knitting machine and knitted in a close 2×1 stitch pattern, and a set of elastomeric yarn of substantially the same type, fully threaded from a guide bar at the rear side of the Tricot type warp knitting machine and knitted in an open 1×1 pillar stitch pattern. The gripping and gummy characteristics on the technical face of the fabric composed of the non-elastomeric and elastomeric yarns are firmly accomplished and quantifiably exposed. A method of manufacturing the warp knitted fabric of this type is also disclosed.
Abstract: A flexible sheet turning arrangement located in a thread path upstream of the guides in a warp knitting machine that has a machine frame and at least one plurality of guides. The arrangement has a set of springs with proximal ends supported on the machine frame, and free distal ends. Also included is a turning element running the full width of the machine and attached to the free distal ends of the set of springs. The set of springs may include a package having at least two leaf springs placed on top of each other and joined at their ends. At least one of the springs may be made of a material having a greater internal coefficient of friction than steel. The springs may be laid to provide such a level of damping that the damping coefficient &dgr; satisfies a relationship involving Td the period of oscillation, and &ycirc ;i, &ycirc ;i+1 the neighboring amplitudes of damped oscillations.
Abstract: A process or apparatus can control thread provision in a warp knitting machine by means of a computer (6). The computer operation involves pattern data (MD) supplied as a sequence of numbers. These numbers are provided to a recognition routine (ER), which for every warp course (line W) determines the lapping type (LA) that should be formed and the shogging distance (SW) prescribed. Tables are stored for providing a thread provision value (FZ) for each combination of lapping type (LA), thread take-off value (WA), and a shogging distance (SW). Based upon (a) the determined lapping type, (b) the inputted fabric take-off value, (c) the inputtable external operating parameters or influences, and (d) the determined shogging distance, the thread provision value for this warp course is read out and utilized for controlling thread provision.
Abstract: The device herein described comprises a pair of pulling rollers 3 which engage a manufactured article 4 produced by knitting members 5 acting upstream of the pulling rollers themselves, in order to interlace weft yarns with warp yarns 4a. A first driving mechanism 6 connects the pulling rollers 3 to a rotating main shaft 7, so that the pulling rollers too are rotated in order to pull the manufactured article apart from the knitting members during the operation of the loom. The device further comprises feed rollers 17, 18 rotated by a second driving mechanism 22 connecting them to the first driving mechanism. Feed rollers 17, 18 act upstream of the knitting members, upon the warp yarns 4a to move them forward towards the knitting members 5 and give them an appropriate tensioning.
Abstract: An improved warp knit fabric that can use conventional warp knit base fabric constructions or instead produce novel sheer base fabrics and apply top effect yarns in the warp direction to produce novelty effects using standard yarn ends. Also, full weight, self-lined fabrics can be formed. This top effect yarn can be fed with varying tension control so that a relatively wide variety of effects can be created together with base fabric which is chosen.
Abstract: A warp knitting machine has a main shaft driven by an electric motor which is powered by a main circuit. The machine has at least one supplemental, electrically driven arrangement for influencing the thread takeoff of the machine. This electrically driven arrangement is connected to the main circuit. Also included is an electrically operable brake coupled to the main shaft for braking it in response to interruption of the main circuit.
Abstract: The invention relates to a method and apparatus for knitting a narrow band in which a special effect yarn for use in the band and the band itself, are knitted simultaneously on one machine and the special effect yarn is taken off and guided directly to the needles knitting the band.
Type:
Grant
Filed:
December 1, 1975
Date of Patent:
September 13, 1977
Assignee:
R. W. Frost Limited
Inventors:
Robert Walter Frost, Anne Winnifred Morris