Sig Schweizerische Industrie-Gesellschaft

Willy Altermatt

Georg Kopp

An apparatus for filling flexible bags includes an endless conveyor having a generally horizontally oriented upper run; and a plurality of bag holders mounted on the conveyor and distributed therealong. Each bag holder includes two cooperating plates extending upwardly from the upper (working) run of the conveyor and movable towards and away from one another. The apparatus further includes a bag supplying device situated along the conveyor for introducing an empty bag between the plates of the bag holder momentarily in alignment with the bag supplying device; a filling device situated above the upper run for sequentially charging the bags with contents; a sealing device situated downstream of the filling device for sealing an open end of the bag; a discharging device situated downstream of the sealing device for releasing the bag from the holder; and a driving mechanism for moving the plates into a spread-apart position at the bag supplying device, the filling device and the discharging device and for moving the plates towards one another into a closed position at the sealing device.

Apparatus for filling flexible bags

A method of making a packaging bag from a wrapper sheet includes the following steps: forming a continuous sleeve from the wrapper sheet; forming a longitudinal seal inward of and adjacent to a longitudinal folded edge of the wrapper sheet by bonding overlapping longitudinal edge portions of the sleeve to one another; forming a transverse seal bonding overlapping sheet portions to one another; cutting a tear-open slit through at least three layers of the wrapper sheet in the transverse seal in an area of intersection with the longitudinal seal; transversely severing the sleeve to provide a packaging bag having an open end spaced from the transverse seal; charging the packaging bag with goods through the open end; and forming an additional transverse seal bonding overlapping sheet portions to one another for closing the open end.

Method of making a packaging bag having tear-open means

An apparatus for making flat packaging bags from a flexible web of indeterminate length includes a machine frame; a sled mounted on the machine frame for travel parallel to the direction of web advance; a first drive for reciprocating the sled parallel to the direction of advance; a mandrel mounted on the sled; a tubular folding body fixedly mounted on the machine frame and coaxially surrounding the mandrel for bending the web about the mandrel to form a web hose; a first sealing shoe mounted on the sled; a second drive for pressing the first sealing shoe against an outer face of the mandrel for providing a longitudinal sealing seam on the web hose situated between the mandrel and the first sealing shoe; a second sealing shoe mounted on the machine frame for displacements perpendicularly to the direction of web advance; a third drive for actuating the second sealing shoe for providing a transverse sealing seam on the web hose; and a cutter for severing a length of web hose from the web.

Apparatus for making flat packaging bags from a flexible sheet of

A packaging bag made of sheet material includes a longitudinal seal situated at the longitudinal bag edge and extending parallel to the bag length. The longitudinal seal bonds together at least two layers of sheet material. The packaging bag further has two transverse seals extending parallel to the bag width and intersecting the longitudinal seal. Each transverse seal bonds together at least two layers of sheet material. A tear-open slit is provided in the longitudinal seal and passes through at least three layers of sheet material of the packaging bag.

Packaging bag having tear-open means

A sealing shoe assembly for forming a seam, by application of heat and pressure, on face-to-face arranged sheets disposed between a backup support and the sealing shoe assembly cooperating with the backup support has an elongated carrier and a sealing shoe supported on the carrier. The sealing shoe is formed of at least two sealing shoe parts which are arranged on the carrier in longitudinal alignment with respect to one another and which are individually and resiliently secured to the carrier.

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Neuhausen am Rheinfall, Switzerland

Willy Altermatt