Package making – Methods – Forming or partial forming a receptacle and subsequent filling
Patent
1992-11-03
1994-02-01
Coan, James F.
Package making
Methods
Forming or partial forming a receptacle and subsequent filling
53452, 53567, B65B 4304, B65B 4112
Patent
active
052823512
ABSTRACT:
The invention relates to a method for making, filling and sealing sacks from a tubular film web of thermoplastic material preferably provided with side folds and printed in format print, where the leading end of the tubular film web is each provided with a transverse weld, and from the tubular film web a section constituting an open sack is cut off, and where the sack is then filled and the open end of the sack is sealed by a transverse weld. For the solution of the object to provide a method of this kind, where it is ensured that the filled sacks are always filled tight and full, it is provided that corresponding to the filling level of the sack the length of the formed tubular film web sections is varied, that after making the transverse weld sealing the sack the tubular film web is intermittently advanced up to a printed mark, that the section constituting the sack is cut off by means of a separating cut without at the same time forming the transverse weld sealing the tube section, that the succeeding tubular film web is again advanced by a comparatively short adjustable length, that alternatively the advanced section of the tubular film web is cut off again, and that the transverse weld sealing the succeeding tube section is formed.
REFERENCES:
patent: 4784697 (1988-11-01), Bordini
patent: 4860522 (1989-08-01), Cherney
patent: 4913765 (1990-04-01), Tetenborg et al.
patent: 4996825 (1991-03-01), Bacon et al.
patent: 5172536 (1992-12-01), Miyahara
Coan James F.
Windmoeller & Hoelscher
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