Abstract:
A packaging machine, in which the packaging is carried out of products fed by free-falling inside a cradle-shaped length of a packaging material, which is provided with a welding/cutting device for welding and cutting opposite edges of packaging material, is capable of accomplishing a continuous weld on three sides of the product-containing packaging material, and of removing ear-shaped scrap portions of said packaging material, generated by the weld.
Abstract:
The invention relates to a device for controlling the unwinding of a plastic film in a packaging machine. The film before coming in contact with a conveyor belt for the products to be packaged passes in succession through a pair of dragging rollers and about a floating bar disposed between fixed guide rollers. The drive roller of the pair of rollers is driven by a variable speed motor by way of two alternately activated transmission of different ratio. Two microswitches disposed at different levels cooperate with the floating bar in order to activate one or the other of the transmissions.
Abstract:
Labels with and without final item identification mark are put on the individual items in a label collocation station located upstream an item wrapping station followed by a film sealing and cutting station, a heating tunnel and a stacker. Reading means associated to the label collocation station read any identification marks on the labels and control feeding of recognition tabs onto the wrapped items from tab feeding means arranged between the sealing and cutting station and the heating tunnel. Tab detecting means arranged between the heating tunnel and the stacker control the stacker to terminate the formation of a batch of items when a tab on a wrapped item is detected.
Abstract:
This invention relates to a packaging machine for wrapping light objects, for example paper cups in flexible plastics wrappers. The packaging machine according to the invention is of the general type including a cell conveyor for the objects, lower and upper plastics films respectively fed below and above the objects and welding and cutting means for joining said films together before each object by operating a double weld with intermediate cut. According to the invention, each cell of the conveyor is provided with at least one upper closing arm carrying an idle roller for the lower film and resiliently retained in cell closing position, there being provided first and second cam means acting on said arm to cause momentary displacements thereof into cell opening position when each cell passes through loading and discharge regions respectively upstream and downstream of the film joining region.
Abstract:
The invention relates to an automatic feeding device for delivering articles from a magazine to a conveyor, wherein the magazine is adapted to permit the articles to be delivered to be pulled out therefrom singly from below, and at least one grab-arm is provided adapted to pick up the article pulled out and to deposit it onto a tray which is being swept from said conveyor. To this end the said grab-arm is capable of performing a rotary-translatory motion between the magazine and the tray.