Abstract: A machine for packaging sundry articles between two weldable plastics material sheets is disclosed, in which provision is made for the formation of a top sheet loop to cope with different tallnesses of the articles as they are being packaged and sealed between the plastics sheet: undue sheet tensions are prevented as well as undue slackening of the sheet.Waste of plastics material is also efficiently done away with.

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: In a conveyance system with crossing paths, such as used in the conveyance of piled-up articles such as newpapers and the like, the improvement consisting in providing two couples of belts arranged crosswise relative to one another and equipped with a lifting mechanism capable of lifting and depressing one couple of belts relative to the other. The lifting mechanism comprises an array of idle belt-tightening rollers and fixed rollers, a few rollers being mounted in such a way as to impart a U-bend to top belt lap, the U-bend area being mounted on a special swingable arm. Appropriate linkages ensure the desired synchronization of the movement of the upper laps of the belts, so that the articles on the belts can easily be passed from a lower-level belt to a higher-level belt, and viceversa. It is also possible to select which belts are to stand at a higher or lower level as necessity demands.

Abstract: In a packaging machine of the kind in which a tubular film is wrapped around the articles to be packaged as they are advanced over a conveyor belt and the film is heat-welded and severed, the improvement consisting in that the welding and the counter-welding rods are vertically reciprocated between respective inactive positions and an approached position whereat both rods cooperate to effect the welding and the film-severing. The height adjustment to allow for different heights of the articles to be packaged is thus greatly facilitated and the film pull reduced.

Abstract: A packaging machine is shown, for various articles, single or multiple, particularly mail, fragile and delicate articles and the like, wherein the article to be packaged is dropped into a partially formed envelope, which is thereafter sealed and severed from the supply of packaging material, any contact of the article with any mechanical gripping device being prevented.

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.