A method and a device for manufacturing filled and sealed packages

摘要

1,012,867. Packaging-machines. A. B. TETRA. Jan. 14, 1964 [Jan. 16, 1963], No. 1623/64. Heading B8C. A package is made by sealing and cutting a filled tube 1 at intervals, upper jaws being pivotable to heat-seal and cut the intermittently fed tube after pistons 20, 21 co-operate with stationary side plates 8, 9 and lower pivoted flaps 16, 17 to form the tube into the shape illustrated in Fig. 5. The level of material in the tube may lie above the sealing zone; or it may lie below the sealing zone and the remaining space be filled with a gas. The material, which may be a liquid, granular, or a powder, provides an internal support for the tube during the forming of the package. After the tube 1 is fed downwards, the pistons 20, 21 move inward and the lower flaps 16, 17 are pivoted in timed relation; thereafter, Fig. 3 (not shown), the jaws 2, 3 close to heat-seal the package which is severed from the tube by means of a knife 36, displaceable in the flap 3. The various forming members are withdrawn to enable the package to be ejected. The package may be modified subsequently by bending down its upper pin 37, and the wings 34, 35 may also be folded in. In a modification, Fig. 8, wall elements 441, 451 are pivoted inwards on jaws 381, 391 to form the package which is sealed by the jaws and cut by a knife 521. The forming and sealing units operate in pairs or in threes on a continuously moving tube, each set of co-operating-jaws and wall elements being actuated successively. The tube may be fed down by the jaws wholly or in combination with other tube-feeding means.