Abstract:
A device and method for forming a moving web of laminated composite material having weakened zones therein from a moving continuous web of relatively extensible plastic film material, having identical sets of graphics printed on nominally constant length repeat length portions thereof which are subject to length variation from a constant design repeat length distance, and a moving continuous web of relatively nonextensible paper material. A method and device for forming a three-layered composite material having weakened zones therein is also described. Carton blanks and liquid tight cartons having tear away tab portions formed from such three-layered composite material are also described.
Abstract:
An apparatus for monitoring the phasing relationship of a moving web of material of the type having a repeating series of graphics patterns thereon which repeat at ordinarily constant distance repeat length intervals of web travel and which contain separate repeating indicia portions which define a repeating indicia set which are positioned in a repeating indicia path extending longitudinally of the web comprising: an indicia detection device for providing an indicia detection pulse signal; a web travel sensing device for providing a web movement signal; an indicia profiling device for processing the indicia pulse signal and the web monitoring signal for generating a unique indicia image for each of the repeating indicia in a selected repeat length portion of the web; an indicia image storage device for identifying and storing the indicia images from a first selected repeat length portion of the web; a register indicia designation device for initially designating one of the repeating indicia to be register indicia; a register indicia sensing device for providing a register indicia pulse signal having pulses which in normal operation corresponds to the detection of the selected register indicia; a register indicia verification device for verifying that the repeating indicia which is in synchronization with said register indicia pulse signal is the currently designated register indicia; and a register indicia correction device for designating the indicia that is in synchronization with said register indicia pulse signal as the register indicia and replacing the previously designated register indicia therewith when the indicia image of the current register indicia is not verified to be the indicia which is in synchronization with the register indicia pulse signal.
Abstract:
A device for forming a moving web of laminated composite material having window portions therein from a moving continuous web of plastic film material and a moving continuous web of paper material. The device comprises cutter means for repeatingly cutting spaced apart perforated window patterns in the paper web and a wetting means for wetting the film web at spaced apart target areas having shapes substantially identical to the perforated window patterns. The device further comprises phasing means having both a coarse mode and a fine mode of operation for providing accurate registry of the perforated window patterns and the wetted target areas. A wetting synchronization means is also described which synchronizes the wetting means with the film target areas whereby the target areas and only the target areas are wetted by the wetting means. Means for removing a paper chad portion from the perforated window patterns subsequent to lamination is also described.