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US 4,729,205 AGranted
Method of producing film-wrapped packages or packaged units, and apparatus for carrying out such method
OwnerPeter Silbernagelinventor
Life of this patent
Estimating the term…
Abstract
A method of producing film-wrapped packages or packaged units, wherein a package or packaged unit is wrapped in a film hose formed by helical wrapping of the film (web) (30). In front of the wrapping front advancing relative to the package, a tear-up thread is also enclosed by the forming film hose. A wakening (tear-up) line is formed in the film hose in the vicinity and along the length of the tear-up thread. Here, an abutment for a spiked roller (10) is formed by a stationary tongue (12) above a conveyor belt (6) and below the film (web) (30).
Claims6
An apparatus for wrapping a package, comprising:
- a wrapping device through which said package can be conveyed;
- upper and lower transport means for conveying a package towards and through said wrapping device;
- means for providing a tear-up thread having first and second sides, and applying the first side of said tear-up thread to a said package as said package is being conveyed through said wrapping device, said second side of said tear-up thread having an adhesive coating;
- means for providing a film hose and wrapping said film hose about said package and said upper transport means as said package passes through said wrapping device, said film hose being formed by helically wrapping a stretch wrap film hose enclosing foil about said package, said film hose enclosing said tear-up thread along the length of a said package, said second side of said tear-up thread contacting said film hose and being adhesively bound thereto;
- and
- means for severing said thread after said package passes through said wrapping device and
- means for forming a material weakening line in the film hose wrapped around a package upon the passage of the wrapped package through said wrapping device, said material weakening line extending substantially the length of said tear-up thread, said film hose being maintained by said upper transport means at a spaced distance from said package while said material weakening line is being formed in said film hose.
4 more elements
Dependencies are inferred from the claim text.