Abstract: The invention relates to a device for changing a reel and for connecting a new material web to the end of an old material web, with a first reel (101) from which the first material web thereof which is wound thereon can be unwound, a transport device (103), particularly a transport roller, by means of which the first material web can be guided in a guiding region at a transport speed, a second reel (121) with which the new material web can be prepared, a drive device for rotatably driving the second reel, a separating device (142) for cutting through the first material web, by means of which the material web can be cut through in the guiding region or upstream of the guiding region in order to produce a trailing end, and a control and/or regulating device for the mutual adjustment of the trailing end and the beginning (125) of the second material web, such that the trailing end and the beginning of the web are at a distance of more than 0 mm from each other and particularly do not overlap.

Abstract: The invention relates to a device for changing a reel and for connecting a new material web to the end of an old material web, with a first reel (101) from which the first material web thereof which is wound thereon can be unwound, a transport device (103), particularly a transport roller, by means of which the first material web can be guided in a guiding region at a transport speed, a second reel (121) with which the new material web can be prepared, a drive device for rotatably driving the second reel, a separating device (142) for cutting through the first material web, by means of which the material web can be cut through in the guiding region or upstream of the guiding region in order to produce a trailing end, and a control and/or regulating device for the mutual adjustment of the trailing end and the beginning (125) of the second material web, such that the trailing end and the beginning of the web are at a distance of more than 0 mm from each other and particularly do not overlap.

Abstract: A sack is formed by first transverse sealing seams from a foil tube, and is provided with at least a first vent channel, which runs largely parallel to the axis of the film tube, and whose inner film layer has first vent openings for venting of the sack interior into the first vent channel. A second vent channel is provided, which is connected to the first vent channel by second vent openings, and which, in turn, has third vent openings, which vent the at least one second vent channel.

Abstract: A blown film extrusion line has an annular die gap, from which a film tube can be extruded, a flatness unit or nip rolls, which fold the film tube, a calibration basket, which is disposed between the die gap and the flatness unit or nip rolls, and which has at least two film-guide elements that guide the film tube such that the film tube retains its round cross-section, with the diameter of the film tube being adjustable by changing the relative position of the two film-guide elements. The calibration basket includes a coupling device that couples the movement of the two film-guide elements to each other.

Abstract: The aim of the invention is to improve devices (3) for transporting material webs (1) and for fixing said webs (1) on a counter bearing (4). Said devices (3) have the following characteristics: at least one transport roller (2, 2a, 2b) for transporting the material webs (1) and means for applying an electrostatic charge (q) to at least parts (8) of the material web (1), wherein the electrostatic forces of said charge (q) aid in the fixing of said parts on a counter bearing. The novelty and inventive step of the invention is that at least one transport roller (2, 2a, 2b) comprises means for applying an electrostatic charge (q) to at least parts (8) of the material web (1). The invention also claims a method for operating a device of this type.

Abstract: The present invention describes a blown film extrusion line (1), which has the following features: an annular die gap, from which the film tube (9) can be extruded, a flatness unit (7,13) or nip rolls (8), which fold the film tube (9), a calibration basket (20,30), which is disposed between the die gap and the flatness unit (7,13) or nip rolls (8) and which comprises at least two film-guide elements (31), using which the film tube (9) can be guided in such a way that it retains its round cross-section, the diameter of the film tube (9,43) being adjustable by changing the relative position of the at least two film-guide elements (31). The coupling means (32,33,35,38,39), which couple the movement of at least two film-guide elements (31) to each other, are particularly advantageous.

Abstract: The aim of the invention is to improve devices (3) for transporting material webs (1) and for fixing said webs (1) on a counter bearing (4). Said devices (3) have the following characteristics: at least one transport roller (2, 2a, 2b) for transporting the material webs (1) and means for applying an electrostatic charge (q) to at least parts (8) of the material web (1), wherein the electrostatic forces of said charge (q) aid in the fixing of said parts on a counter bearing. The novelty and inventive step of the invention is that at least one transport roller (2, 2a, 2b) comprises means for applying an electrostatic charge (q) to at least parts (8) of the material web (1). The invention also claims a method for operating a device of this type.

Abstract: The invention describes a cutting and transport device for material sheets (1) of paper or film, which comprise at least one cutting device (7), which cuts the material sheet traversing in the cutting or the transport device. Inventive step lies in that the cutting and transport device (22) is provided with a sheet reinforcement device (10), which reinforces the material sheet with the reinforcement material (13) at the positions which are later cut by the cutting tool (7).

Abstract: A withdrawal device for blow-molded film has an air turning bar with an air cushioned surface for transporting the film, and the bar surface includes at least in part a sintered material. The sintered material portion of the bar surface provides a region of increased friction for compressed air flow, thus more effectively guiding the withdrawn film in a flat and even form.

Abstract: The invention describes a blown film extrusion system (1), which comprises, as its characteristics, a blowing head (5), which extrudes a film tube (9), further a pinch-off device (8), which pinches off the film tube (9), and additionally film guiding elements (7, 13, 27, 28) that guide the film tube (9) between its extrusion by the blowing head and its pinching off. The inventive aspect is that the guiding elements (7, 13, 27, 28) contain a porous, preferably microporous material.

Abstract: The present invention relates to a withdrawal device for films manufactured in the blow-molding process. A withdrawal device of such type has air turning bars and deflecting rollers that as a rule reverse against one another and usually rotate around a common axis. The withdrawal device proposed by this patent application is characterized by the fact that the surface area of at least one of the air turning bars comprises at least in part of a sintered material.

Abstract: A medical endoscope with a sealed housing that defines a shaft. A working passage, which is open at its ends, extends through the shaft in a sealed manner in the longitudinal direction. The passage projects proximally beyond the housing and has a lateral branch passage for connection of a flow line. The branch passage is arranged on the housing so as to pass through the housing wall and a wall defining the working passage.

Abstract: An endoscopic optics fitted with lens elements and securing device to secure the element positions against shifting in case of being impacted. The securing device is a circumferentially expansible tube that jointly encloses, at least at one abutment surface, the adjoining ends of two lens elements while being of a lesser inside diameter than the outside diameter of the lens elements and being permanently prestressed against them.

Abstract: An endoscope optics including a housing receiving an image-observation device and a tubular stem. The stem is secured to a distal end of the housing. An image transmitting device is mounted inside the stem. The image-observation device is aligned inside the housing with the image transmitting device regarding image position and image center. An insert element is used to adjust the image-observation device and includes an outer contour, which allows stationary affixation to the housing, and an inner, axially continuous borehole, which receives the image-observation device in geometrically interlocking manner. The relative position between the borehole and the outer-wall contour inside the insert element is determined by spatial coordinates ascertained for the particular endoscope optics and specifying the position at which to adjust the image-observation device inside the housing relative to the image transmitting device.

Abstract: An endoscope has a distal objective and proximal devices for image viewing including a fiber optical image guide, which extends within the endoscope between the objective and the devices for viewing the image and one of whose end regions is fixedly mounted on the endoscope and the other end region of which is axially movably mounted, and the image guide is secured in its proximal end region and the remaining distal end region of the image guide is freely movable, the objective also being movably received relative to the endoscope and the distal end of the image guide and the objective being connected together for common axial movement.

Abstract: An endoscopic telescope has a system tube in which spacer tubes are alternatingly stacked with rod lenses each having an external diameter smaller than the inside diameter of the system tube and which have convex end faces supported against the axial ends of the spacer tubes. An end of at least one of the spacer tubes protrudes axially at an angle and at a rotational position so that it abuts the adjacent convex surface of a rod lens, thereby tilting the rod lens relative to the system tube axis. The spacer tubes and the rod lenses are mounted spring loaded between end holding devices in the system tube.