Abstract: A method for operating a double-action piston pump of an application system for applying a fluid medium to a substrate, wherein the piston pump has a piston which is movable between a first reversal point and a second reversal point for delivering the fluid medium, wherein on reaching the first reversal point and the second reversal point, the movement direction of the piston is reversed, wherein during an output period, the fluid medium is output by means of an output device, and during an interruption period, an output of the fluid medium by means of the output device is interrupted, wherein during the interruption period, the movement direction of the piston is reversed, wherein on reversal of the movement direction during the interruption period, the piston is situated at an intermediate position between the first reversal point and the second reversal point.

Abstract: A heated hose for delivering a liquid, in particular for delivering an adhesive has a flexible hose for the passage of the liquid, an insulating layer surrounding the flexible hose, and a heating device surrounding the flexible hose. The heating device is arranged between the flexible hose and the insulating layer. The insulating layer has a strip-shaped insulating material that is wound helically around the flexible hose. The strip-shaped insulating material contains an aerogel.

Abstract: A device for applying a flowable substance to at least one substrate includes an applicator nozzle in the form of a slotted nozzle which has a stationary nozzle body with an inlet opening, a flow duct, and a nozzle slot, wherein the flowable substance is delivered through the applicator nozzle and passes from the inlet opening into the flow duct and from there to the nozzle slot, and is discharged through an outlet opening of the nozzle slot that is arranged in an outer region of the nozzle body, wherein the applicator nozzle further has a slide valve movable relative to the nozzle body in the longitudinal extent of the outlet opening and contacts the outer region of the nozzle body for modifying the covering of the outlet opening. The longitudinal extent of the flow duct is at least as great as the longitudinal extent of the nozzle slot.

Abstract: A device for dispensing a flowable medium, includes a housing having a cavity for receiving the flowable medium, a rod mounted in a bearing section of the housing, wherein the rod is movable by means of an actuator between a first end position and a second end position in an axial direction, a dispensing opening, opening into the cavity, for dispensing the flowable medium, wherein the rod has a sealing section, wherein the sealing section closes the dispensing opening in the first end position and is arranged at a distance from the dispensing opening in the second end position, a bellows seal for sealing off the bearing section from the cavity, wherein the rod passes through the bellows seal, wherein the bellows seal is mounted in a sealed manner on the rod and in a sealed manner on the housing, wherein a first section of the bellows seal is connected to the rod in a manner fixed relative to the rod, and a second section of the bellows seal is connected to the housing in a manner fixed relative to the housing

Abstract: A device and method for dispensing a flowable medium which is an adhesive, a hot glue or a hot melt adhesive. The device has a housing with an interior space and a rod mounted in the housing, wherein the rod is movable by means of an actuator between a first end position and a second end position in an axial direction. The device comprises a diaphragm, wherein the rod passes through the diaphragm, wherein the diaphragm is mounted in a sealed manner in the housing radially on the outside and is mounted in a sealed manner in the rod radially on the inside, wherein the diaphragm divides the interior space into a first cavity and a second cavity and separates the first cavity from the second cavity in a fluid tight manner, and wherein the first cavity serves to hold the flowable medium.

Abstract: A delivery unit for dispensing adhesive having a housing, a melting apparatus arranged within the housing for melting the adhesive, a distributing device for dispensing molten adhesive in at least one line connectable to the distributing device, and a pump for conveying the molten adhesive through the distributing device, wherein the housing has a plurality of outer side faces, two of the outer side faces are of a flat configuration and arranged perpendicular to a support plane of the delivery unit on a base and substantially at a right angle to each other, and wherein the distributing device, in a region in which the line is connectable to a connector of the distributing device, has a boundary surface of a flat configuration. The two outer side faces are arranged at a distance apart with the boundary surface therebetween forming an obtuse angle with each of the two outer side faces.

Abstract: A device for dispensing a fluid medium comprises a head portion and a base body portion, and further comprises a cavity for receiving the fluid medium, wherein the head portion comprises a dispensing opening leading into the cavity for dispensing the fluid medium, wherein the device further comprises a rod that is displaceable in an axial direction between a first end position and a second end position and comprises a sealing portion at a first end portion of the rod that in the first end position is arranged spaced from the dispensing opening and in the second end position closes the dispensing opening on a side facing the cavity. A second end portion of the rod is guided out of the cavity for coupling the rod to an actuator, wherein the device further comprises a seal for sealing the second end portion with respect to the cavity.

Abstract: A slotted nozzle for discharging a liquid adhesive to a narrow edge of a substrate includes a nozzle body, a nozzle slot formed in the nozzle body, a passage in the nozzle body for supplying the adhesive to the nozzle slot, and a slot-shaped outlet opening of the nozzle slot. The nozzle body is configured in the region of averted ends of the nozzle slot that are based on the longitudinal extent of the nozzle slot in such a manner that an increased outlet of the adhesive through the outlet opening takes place in the region of the averted ends of the nozzle slot.

Abstract: A piston pump and a method for determining a volume Veff of a liquid medium delivered to a consumer by a double acting, pneumatically driven piston pump, wherein the piston pump is subject to leakage when a constant pressure is acting on a drive of the piston pump and at least one double stroke of a piston pump from one dead center position thereof to the other dead center position thereof and back to the first dead center position is carried out includes: a. without the piston pump being able to deliver the medium to the consumer, a leakage time tL auf for one stroke of the piston pump from the bottom dead center position thereof to the top dead center position thereof is measured, b. without the piston pump being able to deliver the medium to the consumer, a leakage time tL ab for one stroke of the piston pump from the top dead center position thereof to the bottom dead center position thereof is measured, c.

Abstract: A device for applying adhesive to a substrate, having an application roller that is rotatable about an axis, an installation for dispensing adhesive to a circumferential area of the application roller, a dispensing region of the application roller for dispensing adhesive from the application roller, and having a doctor blade, wherein the dispensing region for adhesive in the rotation direction of the application roller is located behind the installation for dispensing the adhesive to the application roller and ahead of the doctor blade. In such a device it is provided that the application roller is rotatable about a vertical axis and the excess adhesive wiped by the doctor blade reaches a collection installation that is located below the doctor blade. In a method for applying adhesive to a substrate, excess adhesive that has not been applied to the substrate is disposed of.

Abstract: A device for applying a flowable substance to at least one substrate includes an applicator nozzle in the form of a slotted nozzle which has a stationary nozzle body with an inlet opening, a flow duct, and a nozzle slot, wherein the flowable substance is delivered through the applicator nozzle and passes from the inlet opening into the flow duct and from there to the nozzle slot, and is discharged through an outlet opening of the nozzle slot that is arranged in an outer region of the nozzle body, wherein the applicator nozzle further has a slide valve movable relative to the nozzle body in the longitudinal extent of the outlet opening by means of actuating means and contacts the outer region for modifying the covering of the outlet opening. The longitudinal extent of the flow duct is at least as great as the longitudinal extent of the nozzle slot.

Abstract: A device for intermittently applying a flowable substance to a substrate includes an applicator nozzle for applying the flowable substance to the substrate, a tank for holding the flowable substance, a pump for delivering the substance, and a drive means, wherein the pump is actively connected to the tank and driven by drive means, and further including an actuator actively connected to the pump and transferred into two positions, in a first position the actuator conducts the substance to the applicator nozzle, and in a second position blocks the feed to the applicator nozzle, and further including a control device for activating the actuator and for regulating the speed of the drive means of the pump. A method for applying the substance using the device is also provided.

Abstract: A device for melting adhesive having a melting grill that has a multiplicity of passage openings, and heating elements, wherein the melting grill is heatable by the heating elements and melted adhesive heated by the hot melting grill is dischargeable through the passage openings, the melting grill on that side thereof that faces the adhesive to be melted having ribs. The melting grill has rotatable rods that are disposed beside one another and ribs that are disposed on the rods, the rods and the ribs being heatable by the heating elements, wherein ribs of adjacent rods are aligned so as to be directed toward one another, and the passage cross sections of the passage openings between the rods are modifiable by rotating rods of the melting grill. The device enables varied forms of delivery of solid adhesive to be melted at a high specific melting rate without the adhesive thereby being subjected to damage due to excessive thermal stress.

Abstract: A slotted nozzle for discharging a liquid adhesive to a narrow edge of a substrate includes a nozzle body, a nozzle slot formed in the nozzle body, a passage in the nozzle body for supplying the adhesive to the nozzle slot, and a slot-shaped outlet opening of the nozzle slot. The nozzle body is configured in the region of averted ends of the nozzle slot that are based on the longitudinal extent of the nozzle slot in such a manner that an increased outlet of the adhesive through the outlet opening takes place in the region of the averted ends of the nozzle slot.

Abstract: A device for melting adhesive having a melting grill that has a multiplicity of passage openings, and heating elements, wherein the melting grill is heatable by the heating elements and melted adhesive heated by the hot melting grill is dischargeable through the passage openings, the melting grill on that side thereof that faces the adhesive to be melted having ribs. The melting grill has rotatable rods that are disposed beside one another and ribs that are disposed on the rods, the rods and the ribs being heatable by the heating elements, wherein ribs of adjacent rods are aligned so as to be directed toward one another, and the passage cross sections of the passage openings between the rods are modifiable by rotating rods of the melting grill. The device enables varied forms of delivery of solid adhesive to be melted at a high specific melting rate without the adhesive thereby being subjected to damage due to excessive thermal stress.

Abstract: A device for applying adhesive to a substrate, having an application roller that is rotatable about an axis, an installation for dispensing adhesive to a circumferential area of the application roller, a dispensing region of the application roller for dispensing adhesive from the application roller, and having a doctor blade, wherein the dispensing region for adhesive in the rotation direction of the application roller is located behind the installation for dispensing the adhesive to the application roller and ahead of the doctor blade. In such a device it is provided that the application roller is rotatable about a vertical axis and the excess adhesive wiped by the doctor blade reaches a collection installation that is located below the doctor blade. In a method for applying adhesive to a substrate, excess adhesive that has not been applied to the substrate is disposed of.

Abstract: The invention relates to a device for conveying a fine-particle medium, in particular a granulate, including a flexible receptacle for receiving the medium, a receiving fixture for fastening of the receptacle in the region of an upper end facing away from a base of the receptacle, and a suction apparatus, inserted from above into the receptacle, for sucking the medium out of the receptacle. The device further includes outside the receptacle, in its base region or its lateral region, an apparatus for acting on the receptacle for the purpose of its deformation. The device ensures that feed interruptions during the conveyance of the fine-particle medium are avoided so that the medium is kept in a conveyable state, whereby an undisturbed automated feed of the medium is secured.

Abstract: An apparatus for dispensing flowable substances, having a nozzle having an exit opening for dispensing the substances from the nozzle, and a closure part movable by a control element, disposed outside of the nozzle, and configured to release the exit opening and close the exit opening, in the region of a closure part surface that faces the nozzle end. The closure part surface is delimited, in the movement direction of the closure part from the open position to the closed position, by a leading edge, in the leading direction. The closure part surface is disposed next to the nozzle and at a level upstream from the exit opening, with reference to the flow direction of the substances through the nozzle, in the open position. The closure part can be moved from the open position to the closed position by the control element, such that the leading edge of the closure part surface is moved past the free nozzle end.

Abstract: An apparatus for dispensing flowable substances, having a nozzle having an exit opening for dispensing the substances from the nozzle in the region of a free nozzle end, and a closure part that can be moved by means of a control element, disposed outside of the nozzle. The closure part releases the exit opening in an open position and closes the exit opening in a closed position. The control element has a frame, a transfer medium that brings about shape fit and has wheels, the transfer medium generates angle synchronicity of wheels mounted in the frame so as to pivot, a drive for the transfer medium, for pivoting the respective wheel in two opposite pivot directions, a bearing element for the closure part, mounted in wheels so as to pivot. The bearing element is mounted about pivot axles in the wheels, so as to pivot. The pivot axles are disposed in the frame parallel to the pivot axles of these wheels. The closure part is mounted in the bearing element.

Abstract: An application head for dispensing a flowable medium includes a nozzle chamber in the application head and a nozzle needle movably mounted in the nozzle chamber. A supply channel and a supply line introduce the medium into the nozzle chamber. A drive moves the movable element. A lever arm is movably fastened to the nozzle needle and connected to the drive. The lever arm extends through a membrane of a membrane suspension connect the lever arm movably to the application head and form a seal to prevent escape of the flowable medium. Alternatively, a rocker suspension has a lever arm connectable to the movable element and the drive, a plate element has an opening through which the lever arm extends, a rocker mounting device connects the lever arm movably to the application head and a sealing device prevents any escape of adhesive from the chamber through the plate element opening.