Abstract: A machine for the manufacture and stacking of bags, pouches and the like made from a sheath of a thermoplastic material in which an upper welding jaw and a belt driven horizontal cutting blade are slidably mounted to each other for vertical movement relative to each other and the lower welding jaw is also mounted for moving vertically and has a downstream projecting holding shoulder which has a horizontal transverse counter-blade-groove cooperating with the blade in a jaws lowered and closed position for cutting a portion of the sheath which is flexed between the shoulder and a clamp which presses an advanced segment of the sheath to a stacking table. The stacking table includes a vertically moveable pin carrier for impaling the severed end of a formed bag onto a transverse row of needles.

Abstract: A machine for the manufacture and stacking of bags, pouches and the like made from a sheath of a thermoplastic material in which an upper welding jaw and a belt driven horizontal cutting blade are slidably mounted to each other for vertical movement relative to each other and the lower welding jaw is also mounted for moving vertically and has a downstream projecting holding shoulder which has a horizontal transverse counter-blade-groove cooperating with the blade in a jaws lowered and closed position for cutting a portion of the sheath which is flexed between the shoulder and a clamp which presses an advanced segment of the sheath to a stacking table. The stacking table includes a vertically moveable pin carrier for impaling the severed end of a formed bag onto a transverse row of needles.

Abstract: A cutting apparatus for severing a sheath of thermoplastic material during a bag manufacturing operation. The cutting apparatus comprises a stationary frame (1) having a pair of timing pulleys (130, 131) mounted thereon which intermittently drive an endless timing belt (61) looped around the pulleys. The timing belt carries a cutter blade (56) across the width of the sheath during an intermittent cutting run for severing the sheath. The mid-portion of the timing belt is vertically displaceable by two pairs of vertically and horizontally spaced apart guide pulleys (135-138) supported on a vertically moveable frame (143, 71, 144) centered between the timing pulleys on the stationary frame. The vertically displacement of the mid-portion of the timing belt positions the cutter blade for the cutting run across the width of the sheath.

Abstract: A machine for the manufacture and stacking of bags, pouches and the like made from a thermoplastic material in which the upper welding jaw and a belt driven angled cutting blade are mounted in fixed manner to the machine. The lower welding jaw is mounted for moving vertically and has a downstream projecting holding shoulder which has a transverse groove with stepped edges forming a blade support in the raised position of the lower jaw. A blocking shoe is provided a short downstream distance from the holding shoulder and has a blade spring member attached to a bottom surface which extends in an upstream direction toward the lower welding jaw. The blade spring operates to first tension the thermoplastic segment in the raised position of the lower jaw prior to the cutting by the transverse moving blade and then to deliver and hold the severed end of the formed bag on a resilient pad on the stacking table.

Abstract: The invention relates to a reciprocating member.The movable member is integral with one of the ends of a spring plate, whose other end is secured to a fixed frame, the said spring plate being held under pressure by way of a support member such as a cam driven in rotation.The invention finds an application in machines used for the manufacture of plastic bags.

Abstract: Improvements in apparatus for stacking bags, particularly plastic bags, disposed at the outlet of a machine for manufacturing bags and comprising two sealing jaws of which at least one is mobile and of which the other has an edge extending downstream of said jaw and against which may abut a member for supporting the clamping of one of the ends of the bags after they have been cut in order to form a packet of bags assembled by sealing by means of a heating resistance disposed on the edge of the jaw. A means for sucking out the air and the hot gases is disposed opposite the support member 8 and beneath the edge 7 extending the sealing jaw 4. The invention finds application in a bag-making machine, for stacking the bags.