Class 139/79 - Cam

Subclass of Class 139 - Textiles: weaving
Definition: The harnesses are actuated by cams.
No. of patents: 31
Last issue date: 11/11/2008

Number	Title	Issue Date
7448415	Cam motion machine, method of assembly of such a machine and weaving loom in which such a machine is installed A cam motion machine that includes several cams each defining at least one running track for a follower roller. Each cam is provided with a centering bore that permits mounting of the cam on a drive shaft, while elements are provided to apply a tightening force para...	11/11/2008
7318457	Heald frame and a weaving machine including at least one such heald frame A heald frame including two posts, two cross members and connectors which are used for securing at least one post to at least one corresponding cross member. Each connector includes an intermediate tubular fixing element which is disposed in a housing provided in th...	01/15/2008
7140399	Shaft drive system for power loom shafts A novel shaft gear for harmonious engagement and disengagement of individual heddle shafts and for deriving their motion from the rotary motion of a single input shaft has a coupling system with two input elements. While one of the input elements serves to drive the...	11/28/2006
7059356	Shed-forming device for a power loom A shed forming device (1) for a power loom has a plurality of heddle shafts, to which a drive mechanism with a plurality of servo motor groups (13, 14) is assigned. The servo motor groups are located below each of the heddle shafts (3 through	06/13/2006
6938647	Rotating dobby for weaving loom and weaving loom equipped with such a dobby The dobby according to the invention comprises, at the level of each of its blades, an oscillating piece associated with an actuation element, at least one mobile coupling member borne by the actuation element and two pivoting levers subjected, on the one hand, to t...	09/06/2005
6135161	Method of making a fabric and a fabric obtained therefrom A method for producing a fabric, by a loom equipped with healds, a reed and a back roller, characterized by using synthetic filament yarns as the warp yarns and the weft yarns to be supplied to the loom, using a drive system having a cam for the shedding ...	10/24/2000
5653268	Modulator mechanism for a rotary dobby in a loom A modulator mechanism for a rotary dobby, the input side of the modulator mechanism being connected to a drive which rotates at an essentially constant angular velocity and the output side thereof providing an output which is applied to a main shaft contr...	08/05/1997
5467801	Warp yarn leveling motion incorporated with a loom stop timing judging device A loom equipped with a leveling motion incorporated with a cam-operated type shedding motion. The loom is provided with a control unit to control a variety of operations of the loom. Upon stopping of the loom weaving operation in response to a loom stop s...	11/21/1995
5341850	Heddle frame levelling apparatus for a rocking lever cam drive In a weaving machine with a cam mechanism for forming the shed a heddle frame levelling apparatus includes rocking levers which are pivoted about a pin which is urged against a fixed bearing surface on the frame of the machine during weaving by elasticall...	08/30/1994
5309949	Knife control mechanism for a weaving loom A mechanism for controlling the reciprocating movement of knives associated with rocking hooks connected to the heddle frames of a weaving machine which mechanism includes a pair of rotatable drums oriented parallel to the path of movement of the knives. ...	05/10/1994
5273079	Driving weaving frames for different top and bottom warp tensions at beat up A weaving method makes use of a set of weaving frames arranged such that, in each weaving cycle, some of the weaving frames are held in an identical extreme position, while all remaining weaving frames are moved in order to provide different tensions for ...	12/28/1993
5209269	Positive eccentric dobby A positive eccentric dobby having a rigidly mounted roller lever shaft with minimal clearance, on which pivoted roller levers are disposed, which transmit the movement to the heald frames via coupled connecting rods, reversing levers and rods. A camshaft ...	05/11/1993
5115838	Drive system for the knife grids of a double-lift jacquard machine Drive system for the knife grids of a double-lift open-shed Jacquard machine, which is mounted entirely above the Jacquard machine, and which comprises a central drive shaft which at both ends drives a set of conjugate cams which imparts motion to two fol...	05/26/1992
5082029	Loom arrangement for fabrics sensitive to weaving stop marks A loom for fabrics which are sensitive to loom stopping marks, especially twill fabrics, has a disengagement lever (14) on an eccentric drive mechanism of the loom. The disengagement lever is operated by a controlled driving device, so that it causes all ...	01/21/1992
4984607	Device for driving harnesses of weaving machines A device for driving harnesses of weaving machines includes at least two driven cam shafts and at least one pair of conjugated cams connected to each other for each shaft. Swivel mounted levers which swivel about a common shaft are mounted alternately and...	01/15/1991
4817676	Loom shedding motion In a loom shedding motion device, the pivoting motion of cam follower levers driven by cams is transmitted by way of thrust rods, bent levers to the leaves of the loom. Extending from a central bearing of each lever are arms on the motion input side of th...	04/04/1989
4716939	Lever with double rollers for positive cam mechanisms for controlling the heddle frames of weaving looms Levers with double roller assemblies for positive cam mechanisms for controlling the heddle frames of weaving looms wherein each roller assembly comprises a rotating ring supported on a plurality of roller bearings retained relative thereto on a fixed sup...	01/05/1988
4614212	Shedding mechanism for weaving looms A positive harness drive mechanism raises and lowers the harnesses of a weaving loom responsive to a control cam that engages the followers of a pair of actuators at all times, regardless of the stroke direction, resulting in a smoother, more controlled s...	09/30/1986
4572247	Single heddle control device for a weaving machine having a shedding apparatus A single heddle control device having a selecting device containing lifters which are actuated by knives of a knife device. The knife device is connected in a drive arrangement with a shaft drive of a weaving machine and the selecting device has coupling ...	02/25/1986
4538648	Heald control system for a travelling wave shedding loom A heald control system for a multi-phase or travelling wave shedding loom in which each heald is upperly connected elastically, by way of an elastic traction element, to a single support plate which is removably locked to the fixed part of the loom, and t...	09/03/1985
4534385	Leveling device for weaving mechanisms incorporating cams of the negative type The invention relates to a levelling device for weaving mechanisms incorporating cams of the negative type. With each oscillating lever there is associated a tipping pawl adapted, under the effect of a control member common to all the pawls, to bear yield...	08/13/1985
4337801	Device for shedding warp yarns in a weaving loom A device for shedding warp yarns in a weaving loom, such as a jet loom, comprises: cranks supported on machine frames of the loom rotatable in synchronization with the weaving operation of the loom; synchronizing levers swingably pivoted; connecting rods ...	07/06/1982
4314588	Loom A loom includes a plurality of reciprocatably displaceable heald devices each generally disposed in a respective one of a plurality of parallel planes, and a plurality of levers each coupled through an intermediate element to a respective one of the heald...	02/09/1982
4170250	Loom harness mechanism A loom mechanism and method which delays the harness crossing and provides tighter, more uniform beat-up during the weaving process....	10/09/1979
4139997	Patterning device for actuating operating elements of textile machinery A patterning device employs an elongated strip which is fixed between an operating element, such as a guide bar of a warp knitting machine, and a fixed support point. In addition, the patterning device has a displacing element in the form of a rotatable e...	02/20/1979
4071053	Device for the formation of the shed in a multished loom In a shed-forming device for a loom which simultaneously weaves a number of fabric lengths and in which heald-moving cams are arranged along a helical path, the improvement of providing couples of matched levers which are not bound to each other, and wher...	01/31/1978
4005736	Eccentric mechanism for driving a plurality of heddle carrying frames The eccentric mechanism includes deflecting levers which are rotatably mounted on a fixed spindle and which bear against bearing elements in order to preclude an accumulation of tilting forces along the line of the levers. Each bearing element has a disc-...	02/01/1977
3991793	Eccentric drive for a dobby The eccentric drive for moving the heddle frames between a top shed position and a bottom shed position is constructed to form symmetrical sheds not only for large frame movements but also for small frame movements. In one embodiment, the link between the...	11/16/1976
3986529	Eccentric drive for driving the shafts of a weaving machine The eccentric drive for lifting the heddle frame uses a mounting arrangement by which cam rollers can be detachably mounted on a cam-follower lever. The mounting arrangement uses a roller journal which is secured by bolts to the lever and which serves as ...	10/19/1976
3949788	Web weaving machine with several heald shafts A web weaving machine is disclosed. The machine comprises a plurality of heald shafts disposed to have a plane of symmetry common to one another and a plurality of tension transmitting elements. At least one of the elements is flexible and is guided by at...	04/13/1976
3946766	Power loom dobby shedding motion This dobby shedding motion for power looms comprises essentially a series of twin cams mounted on a common drive shaft and oscillating arms each provided with a pair of roller followers adapted to co-operate with said cams. Each cam assembly comprises a p...	03/30/1976

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Class 139/79 - Cam