Abstract: A device for pulling in flat-stock pieces and precisely-aligned transporting of the flat-stock pieces at a work station of a machine for processing the flat-stock pieces has a gripper apparatus that grabs a forward edge of a piece of flat stock and accelerates the flat-stock piece, and a sheet pick-up roller that picks up the accelerated piece of flat stock from the gripper apparatus, whereby the sheet pick-up roller has a roller gripper effective at a circumference thereof for grabbing the accelerated piece of flat stock. The roller gripper can move between a closed position in which the piece of flat stock is held fast and an open position in which the piece of flat stock is released. Suction holes operable to be charged with intake air are disposed in a part of a circumference of the sheet pick-up roller following in a direction of rotation behind the roller gripper.

Abstract: A device for pulling in flat-stock pieces and precisely-aligned transporting of the flat-stock pieces at a work station of a machine for processing the flat-stock pieces has a gripper apparatus that grabs a forward edge of a piece of flat stock and accelerates the flat-stock piece, and a sheet pick-up roller that picks up the accelerated piece of flat stock from the gripper apparatus, whereby the sheet pick-up roller has a roller gripper effective at a circumference thereof for grabbing the accelerated piece of flat stock. The roller gripper can move between a closed position in which the piece of flat stock is held fast and an open position in which the piece of flat stock is released. Suction holes operable to be charged with intake air are disposed in a part of a circumference of the sheet pick-up roller following in a direction of rotation behind the roller gripper.

Abstract: 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 the amount of space required for the machine and generates less noise. The vacuum guide roller is configured as a segment roller in which optionally or selectively the cutout can be drawn in from the stack and accelerated to the cycle speed, or the cutout taken over from the separating cutting device can be accelerated to the cycle speed.

Abstract: A device for the cutting out of flat material blanks from flat material sheets is described, which has a cutting roller and a counter roller working together with it, that form a roller gap into which the flat material sheets can be inserted for the cutting out of flat material blanks, whereby a residual material is produced. This device should be further configured in such a way that on the one hand it is connected with the least possible device expenditure, and on the other hand is not limited in its application to flat material sheets with a specified minimum length.

Abstract: A device and method are disclosed to accelerate, separate, and spatially align blanks such as, for example, envelope blanks. The device may include at least one stop cylinder body that rotates on an axis (the cylinder body including at least one stop element), and may also include at least one entraining transport device that entrains the blanks relative to at least one stop cylinder body. A stop cylinder body may include at least one suction air opening in a lateral surface thereof.

Abstract: 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 by means of 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 the amount of space required for the machine and generates less noise. The vacuum guide roller is configured as a segment roller by means of which optionally or selectively the cutout can be drawn in from the stack and accelerated to the cycle speed, or the cutout taken over from the separating cutting device can be accelerated to the cycle speed.

Abstract: A device for delivering pieces of flat material, which are cut out of a web, into delivery containers is described. This device is to be so improved upon that full delivery containers can be replaced by empty delivery containers, without having to interrupt the delivery process. In order to achieve this, it is proposed to provide at least a first and a section suction roll, which is driven by way of rotation and can be applies with vacuum to retain the pieces of flat material in the peripheral area of said rolls, and at least a first and a second delivery container for delivering the pieces of flat material, in which the vacuum application can be so controlled by means of a vacuum controlling device that the pieces of flat material alternatively can be fed either to the first or the second delivery container.

Abstract: A device for blank separation in a machine producing pieces of flat material cut out of a web is described, in which the web in one direction of conveyance is guided through the machine, and the web comprises at least two rows of blanks at right angles to the direction of conveyance, and in which the device comprises a cutting roll for cutting pieces of flat material out of the web. This device is to be improved in such a manner that it is possible to feed the pieces of flat material to an automated delivery, with the rows of blanks being positioned in relatively close proximity.

Abstract: 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 the direction of movement thereof. The conveyor belt and the guide belt are drivable so as to move synchronously in the direction of travel of the envelope blanks.

Abstract: 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 the direction of movement thereof. The conveyor belt and the guide belt are drivable so as to move synchronously in the direction of travel of the envelope blanks.

Abstract: A rotatable knife roll with at least one foil knife secured on a portion of the body of the roll and having a sharp and endless cutting edge closed within itself to cut out window openings. There are breakthroughs for suction apertures arranged within the cutting edge. There is at least one suction-air control valve arranged on the face side of the roll body. The valve is rotatable relative to this portion of the roll. The suction-air control valve has at least one suction-air-control channel and at least one fresh-air channel. There are suction apertures for temporarily retaining a letter envelope blank over a suction and transport angle zone &agr;, and for retaining a piece of material cut out by the foil knife across a suction and transport angle zone &bgr;. The suction apertures are arranged in rows to which suction channels are allocated in the part of the roll body.

Abstract: 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 adhesive does not cover the entire surface of the carrier strip, but rather covers only areas in the form of stripes extending at least partly across the width of the carrier web. The adhesive stripes are spaced from one another and preferably also from at least one edge of the carrier web or tape. The carrier web is then severed into strips, each provided with one adhesive stripe and these strips with the adhesive stripes thereon are then secured between two rollers to the surface area to be provided with the adhesive.

Abstract: 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 portion of the article and respective precreases are used as a folding arm and fold lines in the formation of the zig-zag fold.

Abstract: A process and apparatus for opening the sealing flaps of a carton using drive elements for spreading or folding such sealing flaps open as required for packaging cartons having sealed bottoms. The boxes are inverted and lowered from a floating position with the bottom up and the sealing flaps hanging down. The flaps are placed on drive elements which move away from each other and in the flap opening direction. The box is then moved to a packaging area in the inverted position and lowered over the materials to be packaged.

Abstract: 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 supporting the trailing edge of the cover and the latter places itself on the opening of the box. Pressure is then applied to the cover from above in order to completely force the cover over the edges of the opening of the box.

Abstract: 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 pushing the stack with the stack support are provided. The stack support is arranged to detour around the envelopes to be boxed respectively during the return stroke, and the pusher member is arranged to detour around the stack being formed similarly respectively during the return stroke.

Abstract: 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.

Abstract: 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 blanks with the windows cut therein and the cut-out waste are separately grasped by suction and removed.

Abstract: In a suction roller for a paper processing machine of the type having at st one supply passage leading to a control head disposed at an end face, the improvement which includes the suction opening being a suction slit. The suction roller may have an insert disposed in a recess at the periphery of the roller, the insert having a side surface cooperating with the recess to define a suction slit.

Abstract: There is provided a device and a method for turning flat articles, more particularly letter envelopes, flat bags or the like. The article is first moved out of its direction of conveyance into a curvilinear path, whereafter--without stopping in its original direction of conveyance--it is moved into a curvilinear path in a new direction until finally advancing onwards in its original direction of conveyance.