There is provided apparatus for grooving or producing partial cuts extend parallel to the direction of transport in paper webs, blanks, cardboard boxes and like workpieces, particularly in the manufacture of envelopes with at least one rotatably mounted grooving disc and an opposing tool in the shape of a roller. Prior to the grooving operation, the workpiece is bent about an axis transverse to the direction of transport.

An article of manufacture, such as letter envelopes, paper bags, shipping uches, and the like is manufactured continuously on a production line that includes a back folding or so-called zig-zagging station which folds back one of the bottom flaps, first in a direction opposite to the continuing feed advance and then in the direction of the feed advance, whereby the formation of so-called bed bottoms or stand-up bottoms for these articles is facilitated. A cross strip (43) of a front or back port...

Adhesive, preferably pressure sensitive adhesive, is applied to an article f manufacture, such as the closure flap of an envelope or paper bag in such a way that the adhesive is protected against activation prior to closing the article. For this purpose, the adhesive is first applied to a continuous web or tape of a carrier material that either has an inherent anti-stick characteristic or is provided with an anti-stick surface coating relative to the adhesive to be applied. Preferably, the adhes...

An apparatus for transporting envelope blanks in an envelope making machine comprises at least one conveyor belt having a plurality of perforation holes therein, on which envelope blanks are transported through the machine in a conveyor plane. Beneath the conveyor belt is at least one suction chamber by means of which ambient air can be sucked through the perforation holes to retain blanks on the conveyor belt. At least one guide belt is provided on at least one side beside the conveyor belt in ...

A device for optionally or selectively drawing in a cutout from a stack of several cutouts, or taking over a cutout from a separating cutting device, which separates the cutout from a material web, includes a vacuum guide roller in which the cutout coming from the stack or the cutout that has been taken over can be passed to a subsequent work station for processing of the cutout in a work cycle, at a cycle speed. This device reduces both production costs and machine maintenance costs, reduces th...

There is disclosed transport apparatus for transporting flexible sheet-like articles, especially envelopes. The apparatus comprises a transport cylinder, which is mounted on a shaft rotatably journalled in a frame and which comprises two cylindrical body portions. The body portions are each provided with axial suction ducts with outlet openings communicating with the circumferential surfaces of the body portions. The body portions are provided at their mutually remote ends with bores into which ...

There is provided a sheet pile replenishment apparatus in the form of a cined unstacking and restacking device for lifting a sub-pile of sheets from a supply pile of sheets, conveying and depositing the sub-pile on a pile of sheets on a feed pile plate of a sheet feeder of a processing machine, such as an envelope or bag machine. The apparatus includes a separating roller, disposed at an adjustable angle, which separates the sub-pile from the supply pile of sheets, a clamp for engaging the sub-p...

The invention relates to a method and an apparatus for packing envelopes o cartons, cardboard boxes, and the like. The apparatus has a machine frame, a laying-down apparatus for individually arriving envelopes, a stacking stage, a filling station for filling the envelopes into the cartons or cardboard boxes, as well as invention is seen in that a table a forward and reverse slideable front stack support for envelopes placed successively one behind the other to be stacked, and a pusher member for...

A method and apparatus for placing a cover on a box is provided wherein the box cover is first lowered inclined and placed on the opening of a moving box such that its edge leading in the direction of motion grips across the edge of the opening of the box leading in the direction of motion, and its edge trailing in the direction of motion, which edge is inclined upwardly, remains supported. The box is moved or advanced in the direction of motion so that the box pulls the cover from the support s...

Windows are cut into envelopes and bags, in a machine with a feed device ing transport rollers for cut-out envelope blanks or for a web, a cutting roller, a tool cooperating with the cutting roller and at least one suction roller for further transport, are arranged in a window cutting station of the machine. The envelope material is moved along a straight line tangentially to the point of cutting out the windows and is then further conveyed in the peripheral direction of the cutting roller. The ...