Elpatronic Ag

Othmar Stieger

Paul Opprecht

Alfred Wenger

Felix Kramer

The apparatus for checking the volume of bottles (1) comprises a head (2) adapted to be moved sealingly onto the bottle mouth (21), with a metering piston (7) which is displaceable in relation to the head (2) to be inserted into the bottle (1) and compress the air contained therein, and a pressure sensor (9) for measuring the excess pressure produced in the bottle. The measured volume (11) in the bottle is linked to a compensating volume (12) through a duct (10). The compensating volume is determined on the one hand by the constant starting height of the metering piston (7) and on the other hand by the variable displacement path length of the head (2). This ensures that the compression ratios are always the same for bottles of different heights, since differences of bottle height are compensated by a balancing piston (13) in the opposite direction, which alters the compensating volume (12) according to the sealing displacement path of the head (2) and thus always keeps the compressed measured volume exactly constant. The apparatus enables deviations in volume occurring in a series production process for plastic or glass bottles to be determined without the need to supply external air to the bottles. The measuring cycle is initiated by recording the pressure rise when the head (2) is placed upon the container (1).

Method and apparatus for testing containers

A sheet-metal blank (10) can be moved through between first and second bending rolls (24, 25). Disposed behind the bending rolls (24, 25) in its direction of movement (12) is a deflecting member (28) by which the sheet-metal blank (10) can be deflected away from the first bending roll (24) and round the second bending roll (25) out of its original direction of movement (12). In order to catch the edge of the sheet-metal blank (10) which was leading in the original direction of movement (12), a catch ledge (29) is disposed at the side of the second bending roll (25) remote from the first bending roll (24) and at least substantially in the common plane of the axes of the two bending rolls (24, 25). The catch ledge (29) is a component of a guide rail (30) on which the rounded sheet-metal blank (10) is guided with its longitudinal edges lying close beside one another during a further axial movement. The guide rail (30) extends at least substantially over the whole length of the two bending rolls (24, 25) and is arranged in such a manner that it is encircled by the sheet-metal blank (10) during the bending of the blank.

Apparatus for rounding and conveying onwards sheet-metal blanks for can

A compact resistance seam welding machine wherein the upper electrode roller (14) is provided on a pivotally mounted arm (12) instead of on a pendulum roller head. The lower electrode roller (16), which is disposed below the upper electrode roller (14), is provided on a rigid lower arm (8) as usual. The pivotal mounting (10) of the arm (12) includes a stack of copper foils (102) on the side adjacent to the lower arm (8) and of a steel strip (101) on the side remote from the lower arm (8). The steel strip (101) and the copper foils (102) are each clamped, on the one side to the machine frame (4) and on the other side to the opposite end of the arm (12). The arm (12) is therefore pivotally mounted on the principle of a parallelogram linkage, while the pivotal mounting (10) serves for the transmission of welding current to the upper electrode roller (14) at the same time. The pivotal mounting ( 10) only permits the upper electrode roller (14) a vertical movement up and down.

Resistance seam welding machine

A stack of blanks is guided between pile guides. Disposed on a support are holding members which can be laid against an exposed blank in the stack in order to grasp it and to be moved, with it, away from the stack. In the course of this, the support is movable over a path which, starting from the stack, extends transversely to the plane of the blanks, then changes over into a direction at least substantially parallel to the plane of the blanks and leading to a pair of conveying members and finally again extends transversely to the plane of the blanks. The conveying members grip the blanks delivered to them by the support, at both sides and convey it onwards.

Apparatus for removing blanks from a pile and conveying them onwards

Locking arrangements (40,44) are respectively connected, for joint rotation, to a driving and a driven hub (10,16) which are mounted for rotation in relation to one another. The two locking arrangements (40,44) can be coupled to one another by at least one detent member (42) which, in an engaged position, produces an axial disengaging force (B) depending on the transmitted torque. A loading device is provided to produce an engaging force (C) which can be overcome by the disengaging force (B) if a certain torque is exceeded. This stressing device comprises a cylinder compartment (36) to which a fluid under pressure can be supplied from an inlet (56) so long as the detent member (42) is engaged. The detent member (42) is connected to a distributing slide valve (32) for joint axial displacement, which distributing slide valve separates the cylinder compartment (36) from the inlet (56) and connects it to a relief passage (76) if the detent member (42) is at least partially disengaged.

Safety clutch for rotating drives

For welding tongues (12) onto sheet-metal parts (10), particularly tear-open can parts, a welding machine having at least one pair of welding electrodes (62, 63) is provided. The sheet-metal parts (10) can be moved through the machine steps between the welding electrodes (62, 63), one behind the other, by a sheet-metal conveyor (15) and be located in a defined position by a positioning device (17). The tongues (12) can each be placed against a sheet-metal part (10) between the welding electrodes (62, 63) in synchronism with the working cycle of the sheet-metal conveyor (15) by a tongue conveyor (18).

Welding machine for welding tongues onto sheet-metal parts

On a machine for welding together the longitudinal edges (12, 14) of rounded sheet-metal container body blanks there are disposed a plurality of rings (24) of rollers round a common longitudinal axis (22), one behind the other in the direction of passage through (A) of the blanks (10). At least some (28) of the rollers (26, 28) of the rings (24) of rollers are each mounted on a roller carrier (40) which is adjustable in the direction away from the longitudinal axis (22) against resilient resistance. The roller carriers (40) are guided in a manner which enables the associated rollers (28) to execute yielding movements at an angle of distinctly less than 90.degree. to the direction of passage through (A) of the blanks (10). For this purpose, the roller carriers (40) are each pivotable about a transverse pin (42) which is disposed at least substantially parallel to the associated roller spindle (38), upstream of this with respect to the direction of passage through (A) of the blanks (10). This guiding of the roller carriers (40) makes an important contribution to avoiding damage to the leading edges (16) of the blanks (10) and to reducing the noise occurring when these leading edges (16) impinge on the rollers (28).

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Kindhausen, Switzerland

Othmar Stieger