Abstract: An ultrasonic welding device includes a sonotrode emitting vibratory energy and an anvil having a work face cooperating with the sonotrode for supporting a workpiece positioned for welding between the sonotrode and the anvil. The anvil has a housing and a plurality of laminae individually shiftably supported in the housing in a face-to-face relationship for forming a lamina stack. Each lamina has an edge face at a side of the lamina stack; the edge faces together constitute the work face of the anvil. There is also provided a force exerting arrangement for imparting individually to each lamina a force oriented towards the sonotrode for individually urging each lamina outwardly of the housing in the direction toward the sonotrode.

Abstract: A hand weapon includes a weapon housing, a breechblock accommodated in the housing for reciprocating motion, a bolt affixed to the breechblock and a slot, having opposite longitudinal edges, provided in the weapon housing. The bolt projects through the slot. There is further provided a slot guard arranged for covering the slot. The slot guard comprises a first and a second sealing lip held by the housing along respective longitudinal edges of the slot and projecting outwardly. The sealing lips are, at least along outer edge portions thereof, in a face-to-face engagement with one another and are locally spread apart by the bolt.

Abstract: An automatic hand weapon has barrel; a gas cylinder having a work chamber; an inlet channel for introducing propellant gas from the barrel to the work chamber; a gas piston slidably received in the cylinder, whereby the piston executes, from a position of rest, a work stroke for operating breechblock components of the weapon. The piston further has a lateral face which is in sliding engagement with a wall of the cylinder. A first bore is provided through the wall of the cylinder for forming part of the inlet channel. A second bore is provided through the piston. The second bore has a first opening in the lateral face of the piston and a second opening in the end face of the piston. In the position of rest of the piston the first opening of the second bore is in registry with the first bore, whereby the second bore maintains communication between the first bore and the work chamber of the cylinder.

Abstract: A dual bag has an inner liner and an outer wrap, a flatly pressed closing flap arranged in a face-to-face relationship with a top face of the bag. The flap has a closing ear at least at one of its ends. A transverse seam is provided in the closing flap along its outer bounding edge for sealing the bag. The closing flap is formed by portions of both the inner liner and the outer wrap and further, the transverse seam is located at a distance from the outer bounding edge of the closing flap. A cut extends into the closing flap from its outer bounding edge in the vicinity of at least one closing ear; the cut extends through both the inner liner and the outer wrap. Further, the distance of the transverse seam from the upper face of the bag is at least three times the width of the transverse seam.

Abstract: So as to permit operating a shunt-wound motor with the series characteristic without the use of electronic armature current adjusters, it is proposed to start the motor (1) with the connection of start-up resistances (R.sub.1 -R.sub.4) and to control each step added by means of a comparator by a minimum armature current value (I.sub.A min o -I.sub.A min 4) specifically predetermined for each step. After said minimum value specific to each step has been reached, the comparator (7) actuates a guide and a regulating switch (S.sub.w, S.sub.x), whereby the minimum armature current value so reached specific to the step is kept constant by means of adjusting the excitation (I'.sub.E), and a limiting unit (17) prevents the exciting current (I'.sub.E) from dropping below a predetermined minimum value (I'.sub.E mn), which, at higher numbers of revolution (n), again leads to the shunt characteristic, now with reduced excitation (I'.sub.E min) and the resistances (R.sub.1 -R.sub.

Abstract: The lifting step of the entry stair for rail vehicles is guided on both sides by two parallel guide brackets and while staying parallel to an extendable and retractable vehicle floor, forms a shallow arc from one end position to the other. In its upper end position it is level with the vehicle floor. The vehicle door closes along its outer edge with an elastic door seal. The folding step turns around the turning axis. In the "up" position the folding step stands about vertically and, together with the covering plate attached to the lifting step, forms a flush covering apron completing the side wall of the vehicle. The angle of incline for the stairs, in general, might be about 40.degree.. This stair system does not form any niches when in the "under way" position wherein ice and snow could accumulate. Nor does this stairway require additional covering parts such as movable covering aprons, etc.

Abstract: In a safety valve for a hermetically sealed container, which valve includes a carrier plate having a lateral edge flange for fastening the carrier plate to the container and presenting a shallow recess having a base provided with a central opening, a flexible diaphragm inserted in the recess and covering the central opening, and a viscous sealing agent interposed between the base of the recess and the diaphragm, a clamping member is disposed in the recess and provided with pressing jaws positioned to clamp an edge region of the diaphragm against the base of the recess.

Abstract: An apparatus for forming groups of upright-oriented, stacked articles includes a supply conveyor for advancing the articles in a flat-lying, spaced relationship, a conveyor wheel and transfer pushers pivotally secured to the conveyor wheel in a circular array. The transfer pushers extend outwardly from the wheel and are arranged for consecutively lifting off flat-lying articles from the supply conveyor and for conveying the articles in a curvilinear path from an upstream end to a downstream end thereof. A guiding mechanism imparts a pivotal motion to the transfer pushers during their travel along the curvilinear path.

Abstract: A package assembly has a group formed of a plurality of individual, gas-pervious packages; a gas-impervious wrapper surrounding the group airtight; and a one-way pressure relief valve affixed to the wrapper for discharging gases from the space between the wrapper and the individual packages.

Abstract: In apparatus for producing bag packages and including a shaping mandrel presenting a shaping surface and a longitudinal seal forming device for forming a panel of sealable material into a tube and transverse sealing jaws and severing blades for dividing the tube into individual bags, the mandrel includes members defining two carriages mounted at diametrically opposite sides of the mandrel and forming at least in part the shaping surface of the mandrel, and there are further provided clamping members each mounted to face a respective carriage and to be moved toward the shaping mandrel to press the tube against the carriages and thus clamp the tube, and elements connecting the carriages and clamping members together for movement in unison in the longitudinal direction of the mandrel.

Abstract: In a foil bag composed of a foil piece and a tearing strip means, the bag having a flattened head portion, a longitudinal seam extending across the head portion, and a transverse seam transverse to, and crossing, the longitudinal seam in the head portion and sealing the bag, the tearing strip being spaced from the transverse seam in the direction toward the interior of the bag, and serving to aid opening by permitting a wall of the head portion which is not traversed by the longitudinal seam and which extends approximately across the width of the head portion to be torn open, and the tearing strip being provided with a gripping part projecting from the bag, the bag is provided with cuts defining a U-shaped passage opening, the gripping part extends through the opening from the interior of the bag to the exterior of the bag, and the bag is further provided with a seam parallel to the transverse seam and at the opposite side of the opening from the transverse seam, and a sealing seam intersecting the transverse

Abstract: A method and an apparatus for grouping flat items in stacks, particularly cookies which are advanced to a grouping device in at least three mutually parallel channels. The grouping device forms mixed groups of the items such that each group contains at least one item taken from each channel. For the purpose of compensating for an undersupply of items in at least one channel, the quantity of items which is normally taken from such an undersupplied channel is decreased by a first quantity and the quantity of items which is normally taken from the other, normally supplied channels is increased by a second quantity such that as the cadenced removal of items from the channels progresses, the number of items in the obtained mixed groups remains constant.

Abstract: Apparatus for forming objects into groups and inserting successive groups into containers, which includes a grouping station, an individual item conveyor for guiding the objects individually to the grouping station, a group conveyor for conveying the objects in groups away from the grouping station, a container conveyor for conveying successive containers relative to the group conveyor, and a mechanism for inserting groups of objects conveyed by the group conveyor into successive containers, and in which the item conveyor and the group conveyor convey the objects at least approximately in the same direction into the inserting mechanism, and the inserting mechanism includes a vertically movable holding device movable between an upper position in which it holds a group of objects and a lowered position at which it can release such group of objects within an open container which has been brought into position by the container conveyor.

Abstract: This disclosure concerns a spring system between the body of a railroad car and the wheel supporting truck. The spring system includes a coil spring for absorbing vertical forces and includes a rubber layer spring for absorbing lateral forces, the latter resulting from lateral impact and movement of the railway car along curves in the track. The last mentioned rubber spring is coaxial with and placed inside the first-mentioned coil spring, thereby minimizing the vertical height of the spring system. A pair of spring washers extends laterally between the car body and the truck. The spring washers are held apart by the coil spring. The rubber spring is divided between a first section above the upper spring washer and the undercarriage of the car and a second section beneath the lower spring washer and the frame of the truck. The spring washers have a plurality of troughs for receiving a plurality of sets of springs.

Abstract: A pneumatic drive for a hammer tool has a cylinder; a piston slidably received in the cylinder and dividing the inner space of the cylinder into two cylinder chambers; a drive output member formed as a piston rod attached to the piston and projecting from the cylinder; a pressure-responsive valve for admitting compressed air alternately to the cylinder chambers; and a plurality of spaced, serially arranged cylindrical discharge ports in the cylinder wall for releasing compressed air alternately from the cylinder chambers dependent upon the position of the piston with respect to the discharge ports.

Abstract: A dosing system for filling a receptacle with a predetermined desired weight of flowable bulk material. The system has a main dosing apparatus for charging the receptable to an extent less than the predetermined weight and an additional dosing apparatus for complementally charging each receptacle to an extent equal to the deviation between the desired weight and the actual weight resulting from the charging by the main dosing apparatus. The additional dosing apparatus has a dispensing wheel having a plurality of cells of predetermined volume. There is further provided a movably supported shroud member having a shroud face extending along a circumferential portion of the wheel and separating an inlet chamber from an outlet chamber. The position of the shroud member is adjustable for determining a minimum clearance between the shroud face and the periphery of the wheel. A spring urges the shroud member towards the wheel for allowing a resilient yielding movement of the shroud member away from the wheel.

Abstract: An apparatus for inserting finned packages into a container, in successive groups of laterally juxtaposed packages, by clamping at least one fin of each package in a group in a common clamping device composed of a movable clamping jaw and a counter jaw, introducing the clamped-in packages into a container, and releasing the clamping device to deposit the group of packages in the container.

Abstract: A passageway system (vestibule system) for providing a space and passage for passengers to walk between two vehicles, especially railway cars. In order to provide complete protection from the elements, the entire passageway is surrounded by a sealing membrane and the two separable portal halves are joined together and are held in a well-defined central position. Due to the construction of the passageway as a framework held entirely within the fully surrounding bellows, the passengers are protected in all positions of the passageway and the associated railways cars. The support frame for the passageway may include support arms which carry the entire weight of the passageway and permit the use of vehicles couplers that cannot provide a support function. The passageway includes bridge members, one of which is attached to the threshold of the car and the other is attached to the threshold of the central portal and the two bridge elements cooperate by gliding on top of one another in the manner of fish scales.

Abstract: Flat, rectangular items are, in a contacting series, conveyed by an input conveyor to an output conveyor, on which the items are to be further advanced by pusher members such that those sides of the items which were transversely oriented with respect to the advancing direction on the input conveyor are parallel to the advancing direction on the output conveyor and further, that the items are spaced from one another on the output conveyor. The angle defined by the directions of advance on the two conveyors is less than 90.degree.. In the zone of reorientation each item is engaged by a pusher member from behind and is pushed off laterally from the input conveyor onto the output conveyor. At the same time, a moving reorienting member engages a frontal part of the item and, while a diametrically opposite item corner is in engagement with an abutment, the reorienting member moves the item into alignment with a guide oriented parallel to the direction of advance of the output conveyor.

Abstract: The apparatus includes a mandrel, about which blank sheets are successively folded to obtain packaging sleeves. On one face the mandrel has a recess which extends in the length dimension of the mandrel and in which a first pressing shoe is arranged for reciprocation parallel to the mandrel length. A face of the first pressing shoe complements a mandrel face to a continuous folder face. A second pressing shoe cooperates with the first pressing shoe in pressing and bonding together overlapping edge zones of the blank folded about the mandrel. The first and the second pressing shoes are--as they press the overlapping edge zones--movable as a unit together with the packaging sleeve relative to the mandrel parallel to its length dimension. In this manner the packaging sleeve is stripped from the mandrel, while the adhesive between the overlapping edge zones sets as the stripping takes place.