Abstract: A rotary cutter includes a hollow rotary mantle having a cutter arbor on an outer periphery thereof, through holes extending radially through the mantle, and an air distribution mechanism. The air distribution mechanism includes first and second parts. The first part is affixed to the mantle coaxially therein for rotation therewith. The second part is arranged inside the first part, wherein the first distribution part is rotatable relative to the second distribution part. The first and second air distribution parts define air passages for communicating selective ones of the through-holes of the mantle with an air source in response to relative rotation between the first and second distribution parts.

Abstract: The invention concerns a device for die-cutting a stack of sheet-like materials, particularly labels, whereby the stack is pressed into the die-cutter blade by a relative movement of a punching ram and a hollow cylindrical die-cutter blade. For a device such as this, it is proposed that the die-cutter blade 18 is adjustably held in a frame 16, and the frame 16 is accommodated by a receiving apparatus 13 which is mounted in a punch platen 12 and is adjustable relative to it, whereby the frame 16 can be slid in a plane parallel to the punch platen 12, in particular is adjustable in the direction of two major axes that are essentially arranged perpendicular to one another, and can also be tilted out of the plane. Such a device allows for precise orientation of the die-cutter blade relative to the stack to be punched.

Abstract: The invention relates to a device for die cutting a stack consisting of sheet-type materials, in particular labels. According to said method, a movement of a stack to be cut in relation to a hollow cylindrical be pushed into said die-cutter blade. This type of device is characterized in that the die-cutter blade (18) is adjustably mounted in a frame (16), which can be inserted in a holding device (13) perpendicularly to the relative displacement direction (K) of the stacks to be cut (7) and die-cutter blades (18), and can be fixed in a central position. The holding device (13) is mounted in a die-cutter head plate (12), in such a way that it can be adjusted in relation to the latter. A die-cutter device of this type has an extremely compact construction, as a result of the positioning and mounting of the die-cutter blade in the direction of the relative movement of the stack to be cut and the die-cutter blade.

Abstract: A rotating cutting cylinder and an opposing member, wherein the cutting cylinder is fitted with a plurality of blade segments distributed along the length of the cutting cylinder and connected to one or more actuators for producing a movement of selective extension and retraction of said blade segments with respect to said cutting cylinder.

Abstract: The invention concerns a device for die-cutting a stack of sheet-like materials, particularly labels, whereby the stack is pressed into the die-cutter blade by a relative movement of a punching ram and a hollow cylindrical die-cutter blade.

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: A rotary cutting assembly is provided for cutting a panel from an envelope blank or the like. The die holder has an outer surface and a plurality of surface orifices radially communicating with corresponding feed tubes for supplying vacuum or air to the surface and into the vicinity of the envelope blank. A novel air delivery assembly is provided for delivering vacuum and/or air to the die holder comprising a stationary plate disposed at least at one end of the die holder and defining a groove member for selectively supplying vacuum and/or air so that when rotation of die holder aligns the longitudinal feed tubes with the groove member a supply of vacuum or air is selectively supplied at the surface orifices of the die holder. Another embodiment of the die holder may have an outer surface having a extending along the longitudinal axis for detachably receiving the leading end of the cutting die and a plurality of magnetic members disposed in the die holder surface for attracting the cutting die.

Abstract: In a rotary press cutter for the production of envelope blanks, a flexible foil cutting die (8) is used. The leading edge of the foil cutting die (8) is anchored against a leading face (20) of the rotary punching roller (10), and the trailing portion of the foil cutting die (8) extends without creasing over a rounded outer portion of the blade anchorage slot, to be held against the outer periphery of the punching roller (10) by magnetic attraction from inset magnet means (15). The leading edge of the foil cutting die is preformed to provide a location and anchorage flange (24) which is bent without creasing to an obtuse angle to the remainder of the foil, with a radiussed junction between the flange (24) and the remainder of the foil. A unique structure of the magnet means (15) provides very strong adhesion of the body of the foil cutting die (8) to the punching roller (10).

Abstract: The invention relates to a knife roller with at least one film knife which s securable on a multi-part roller body, which comprises suction openings around its circumference, and connected thereto, suction channels extending in the lengthwise direction. The gist of the invention is that:a) suction openings are provided along several suction hole rows arranged next to one another in the circumferential direction,b) one suction channel is arranged to correspond with each suction hole row, andc) at least one suction air control channel and at least one adjustable suction air control disk are provided,d) by means of which the suction air control channel is selectively connectable with different suction channels, suction hole rows, and their suction openings.

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: An apparatus for producing envelope blanks has means for advancing a continuous web of paper along a horizontal path, two sets of rotatable cutter blades are located one on each side of the path of travel of the web. The blades are operable to cut out portions from each side of the web. The blades on each side of the said path being located on a common shaft. Each set of cutter blades comprises at least three cutter blades. Each blade is located on a cutter bracket mounted on the shaft so that the angular position of the blade on the shaft is adjustable through 360.degree.. Each blade in each set is located opposite a similar blade in the other set to form a matching pair and the cutting profiles of the blades in each set are different and including a cutting point in each blade. The positions of the common shafts are also adjustable so that the sets of cutter blades are movable towards each other or away from each other as desired.

Abstract: A quick change cutting cylinder for letter envelope and hygiene machines is rovided wherein the cylinder is rotatably received on both its sides with conical cylinder journals on the end faces thereof coaxially in respective bearing units which run with pretensioned precision anti-friction bearings with great radial and axial stiffness without play, and which are locked on a common parallel guide by means of fast-acting clamping devices.

Abstract: A rotary envelope machine blank cutter is provided with laterally adjustable, independent frame units for each meshing set of knife rolls for changing the depth of a side cut into a blank for envelope size and style production changes. The rotational and axial meshing of hard and soft knives respective to a single knife roll set is adjusted without disturbing the roll mount of either knife. Changes in envelope length or style are accommodated by the mechanical capacity to adjust the rotation cut timing between the knife roll sets of a two-set unit and also between respective cutting units of two or more two-set units. As in the case of lateral cut adjustments, knife roll mounts are undisturbed by rotational timing adjustments. Consequently, the machine may be quickly and accurately changed for production runs of any of several envelope style and several sizes respective to each style: all adjustments being made without disturbing the knife profile mesh of any knife set.

Abstract: A rotary envelope machine blank cutter is provided with laterally adjustable, independent frame units for each meshing set of knife rolls for changing the depth of a side cut into a blank for envelope size and style production changes. The rotational and axial meshing of hard and soft knives respective to a single knife roll set is adjusted without disturbing the roll mount of either knife. Changes in envelope length or style are accommodated by the mechanical capacity to adjust the rotational cut timing between the knife roll sets of a two-set unit and also between respective cutting units of two or more two-set units. As in the case of lateral cut adjustments, knife roll mounts are undisturbed by rotational timing adjustments. Consequently, the machine may be quickly and accurately changed for production runs of any of several envelope style and several sizes respective to each style: all adjustments being made without disturbing the knife profile mesh of any knife set.

Abstract: A drive shaft of the gumming and folding section of an envelope machine rotates at a preselected speed and is drivingly connected through meshing gears to the input shaft of a variable speed drive mechanism. The input shaft is connected to an output shaft through a differential transmission so that the output shaft is driven at a preselected ratio relative to the speed of the input shaft. The output shaft is drivingly connected to a web feeding apparatus that conveys a continuous web of material from a supply roll at a preselected speed. Thus, the web feeding apparatus is driven at a predetermined ratio relative to the speed of the drive shaft. A web cutting apparatus is drivingly connected to the input shaft so that a cut off knife is rotated at a fixed speed relative to the drive shaft to cut the continuous web at preselected intervals to form envelope blanks having a bottom flap connected to a closure flap.

Abstract: A tri-level output sensor senses faulty window construction in a web of continuous business forms of stationery, for controlling visual and audible indicators, including a display of the relative position of the faulty sensed window construction, within a continually fanfolding end stack. Pulsing circuitry drives tri-level-to-digital processing circuitry, conjointly providing referencing information to process the sensor output and timing information to sample the processing circuitry, and drives a pair of counters for fanfold position indication and consecutive-fault-occurrence determination, dependent on the processing output.

Abstract: An improved cutting device of the type having rotary vane knives, which cerate with stationary knives, for making patterned cuts in the edges of paper webs, particularly for the preparation of envelopes or envelope blanks, is provided. The device includes at least one cooperating knife pair, comprising one rotary knife and one stationary knife, disposed for cooperative engagement for making patterned cuts in the edges of paper webs moving therepast. The blades are made of materials differing from one another in hardness to an extent such that the softer knife can have material removed from it without damage to the latter, and at least one of the knives of the cooperating knife pair, is mounted for feeding movement toward its associated cooperating knife, while the cutting device is operated.

Abstract: A rotary cutting apparatus for forming serially connected envelope blanks from a longitudinally advancing web of sheet material is provided with two rotary knives, both of which rotate into cutting relationship with the same stationary knife but at different times. The web of sheet material is advanced over the stationary knife so that at least one side of the web is positioned between the stationary knife and each of the rotary knives to remove a section at the side of the web. With two sets of rotary and stationary knives operating respectively on the two sides of the web, a series of interconnected envelope blanks can be formed by feeding the web through the cutting apparatus at a speed coordinated with the rotations of the knives. By adjusting the angular relationship of the two rotary knives with respect to one another about the axis of rotation, the section of sheet material removed from the advancing web can be varied correspondingly.

Abstract: A device for feeding a foil blank and envelope made therefrom for enveloping a cigarette block in a cigarette wrapping machine with side folds on the narrow sides. The foil sections which overlap each other at the narrow sides of the envelope extend at a slant. The width of the respective outer side increases toward the head portion of the envelope in such a way that the corner during the preparation of the head fold rests on the last cigarette of the outermost cigarette row.

Abstract: The rotary panel cutter includes a cutter die that has a continuous upstanding knife blade. The cutter die has a body portion that is secured to a rotatable cutter shaft having a longitudinal axis. The cutter die knife blade has side edge portions that are perpendicular to the longitudinal axis of the cutter shaft and leading and trailing edge portions that are not parallel to the longitudinal axis of the cutter shaft. For cutting rectangular openings in a web the continuous upstanding knife blade has the configuration of a regular parallelogram wherein the length of side edges is the same and the length of the leading and trailing edges is also the same. The rotatable cutter shaft is mounted in a machine frame with its longitudinal axis at an angle other than 90.degree. with the center line of the web. The angle that the rotatable cutter shaft deviates from 90.degree. is preferably the same angle as the angle of deviation of the knife leading and trailing edges from the longitudinal axis of the cutter shaft.

Abstract: A rotary cutting assembly is provided for cutting a panel from an envelope blank or the like. The die holder has an outer surface and a plurality of surface orifices radially communicating with corresponding feed tubes for supplying vacuum or air to the surface and into the vicinity of the envelope blank. A novel air delivery assembly is provided for delivering vacuum and/or air to the die holder comprising a stationary plate disposed at least at one end of the die holder and defining a groove member for selectively supplying vacuum and/or air so that when rotation of die holder aligns the longitudinal feed tubes with the groove member a supply of vacuum or air is selectively supplied at the surface orifices of the die holder. Another embodiment of the die holder may have an outer surface having a extending along the longitudinal axis for detachably receiving the leading end of the cutting die and a plurality of magnetic members disposed in the die holder surface for attracting the cutting die.