Abstract: A self-piercing blind rivet is provided for apposing biological tissue together with a device for setting the same, especially through the instrumental channel of a flexible endoscope. Without the help of further instruments, it is possible to fix, approximate and appose tissue layers, the contact force while connecting the tissue layers being adjustable. The rivets are stored in the setting device, so that they can be applied in order. The rivet and setting device enable the surgeon to combine tissue discontinuities conveniently by means of an endoscope. The surgical procedure is simplified further because the rivets can remain in the body.

Abstract: A self-piercing blind rivet is provided for apposing biological tissue together with a device for setting the same, especially through the instrumental channel of a flexible endoscope. Without the help of further instruments, it is possible to fix, approximate and appose tissue layers, the contact force while connecting the tissue layers being adjustable. The rivets are stored in the setting device, so that they can be applied in order. The rivet and setting device enable the surgeon to combine tissue discontinuities conveniently by means of an endoscope. The surgical procedure is simplified further because the rivets can remain in the body.

Abstract: A printer includes a printer carrier having a surface for receiving ink for transfer printing onto a carrier material, such as paper. Areas of the surface print carrier are ink attracting and others are made ink repelling. The ink repelling areas are formed by providing the surface with a layer of a substance in a solid phase, such as water in the form of ice. The ice layer repels the ink as it is applied so that the ink is only held on the surface of the print carrier at the areas that are ice free. The ice layer is formed by cooling the surface using a cooling mechanism to form a coating of frost due to condensation. A surface tension reducer for water is coated on the surface prior to cooling the surface. A laser or other radiation emitter structures the ice layer to form the print image.

Abstract: A printer includes a printer carrier having a surface for receiving ink for transfer printing onto a carrier material, such as paper. Areas of the surface print carrier are ink attracting and other are made ink repelling. The ink repelling areas are formed by providing the surface with a layer of a substance in a solid phase, such as water in the form of ice. The ice layer repels the ink as it is applied so that the ink is only held on the surface of the print carrier at the areas that are ice free. The ice layer is formed by cooling the surface using a cooling mechanism to form a coating of frost due to condensation. A surface tension reducer for water is coated on the surface prior to cooling the surface. A laser or other radiation emitter structures to ice layer to form the print image.

Abstract: Disclosed is a piezo bending transducer drop-on-demand print head and a method of actuating it. Each of the piezo bending transducers of a piezo bending transducer drop-on-demand print head is subjected to a sequence, corresponding to the desired print image, of triggering pulses each effecting a drop discharge movement and, assigned to each triggering pulse, each piezo bending transducer neighboring the piezo bending transducer triggered by the triggering pulse is subjected to a compensating pulse deflecting it. The piezo bending transducer drop-on-demand print head has a nozzle plate with nozzles arranged in series. Respectively assigned to each nozzle is a piezo bending transducer which can be subjected to a triggering pulse accompanied by a drop being discharged from the respective nozzle. There is a control device by which each of the piezo bending transducers can be subjected to triggering pulses and compensating pulses in accordance with the method of the invention.

Abstract: A printer includes a printer carrier having a surface for receiving ink for transfer printing onto a carrier material, such as paper. Areas of the surface print carrier are ink attracting and others are made ink repelling. The ink repelling areas are formed by providing the surface with a layer of a substance in a solid phase, such as water in the form of ice. The ice layer repels the ink as it is applied so that the ink is only held on the surface of the print carrier at the areas that are ice free. The ice layer is formed by cooling the surface using a cooling mechanism to form a coating of frost due to condensation. A surface tension reducer for water is coated on the surface prior to cooling the surface. A laser or other radiation emitter structures the ice layer to form the print image.

Abstract: The printhead has a multitude of adjacently arranged channels with piezo-electrical shear converters. The impulse form for activation of the converters—depending upon the number of simultaneously activated neighboring channels—is changed in such manner that the exit velocity of the ink droplets is constant. This makes it possible to obtain a better print image.

Abstract: In a printing method and system for production of a print image on a carrier material, a print carrier is provided, a surface of which is charged with water vapor at locations corresponding to structures of the print image to be printed. Water vapor is condensed at these locations as a film of water. Ink is applied to the surface, the ink adhering to non-wetted locations and not being accepted by the wetted locations. The ink from the non-wetted locations is printed onto the carrier material.

Abstract: In a pump chamber connected to a liquid supply, an overlapping piezoelectric flexural transducer is disposed so that when voltage pulses are applied to produce an excursion, a number of droplets can be expelled from a nozzle array in the housing wall of the pump chamber using a plurality of nozzles. Gaps are formed between the edges lateral to the direction of overhang an the free end of the piezoelectric flexural transducer ad adjacent section of the housing wall. The nozzle array can be disposed in the projection of the plate surface of the piezoelectric flexural transducer in its direction of motion or in the extension of the piezoelectric flexural element or in another suitable pattern. As part of a combustion device the droplet mist generator is excellent for producing a combustible fuel-oxidant mixture.

Abstract: Variation of ink droplet velocity and droplet mass in thermal ink-jet print heads having at least one primary heater element is achieved by means of a circuit for generating time-shifted heating pulses. The heater element structure is such that there is at least one secondary heater element in addition to and physically separated from each primary heater element. The circuit for generating time-shifted heating pulses for the primary and secondary heater elements applies those pulses in such a way that a vapor bubble has already formed in the printing fluid on the secondary heater element at the point at which a vapor bubble starts to form in the printing fluid on the primary heater element.

Abstract: In an ink print head of sandwich type construction which works according to the bubble-jet principle, the heating elements, electric lines and contacts, as well as the shoot out openings are advantageously produced in the same chip by planar processing steps (back-shooter principle). The heating elements and the shoot out openings are arranged so as to be laterally offset relative to one another in such a way that the spreading direction of the steam bubble is directed opposite to the ink shooting direction. Such an arrangement results in a simple and accordingly inexpensive production of such ink print heads since all precision processing steps are advantageously effected in a planar process and joined on one element.

Abstract: A droplet generator includes a housing (1) wherein there are attached at their one end a multitude of piezo-electric flectional-benders (19), arranged next to each other. A second end (16) of each of the benders (19) is located above a separate jet (7) which leads from a chamber (5) to the exterior. Between the individual benders (19) there are installed separation walls (26). Any cross communication as a result of viscous coupling between benders or due to pressure fluctuations is avoided and the efficiency is improved, so that a better graphic image is attained. The benders have an electrically insulating coating, so that the droplet generator is also suitable for electrically conducting inks.

Abstract: An aerostatic bearing includes a thin material thickness area having a bearing surface and a back side opposite to the bearing surface, and a plurality of nozzle-forming microholes formed in the thin material layer and having a conical cross-section, with the microholes being drilled with a laser beam applied from the back side, and with the most narrow section of the microholes being located on the bearing surface.

Abstract: A method for manufacture of at least one micronozzle in an aerostatic bearing, wherein at least one hole is placed into a compacted bearing surface from porous sintered material by means of a laser beam and disposed so as to be distributed across the surface. The holes distributed across the compacted bearing surface constitute micronozzles of an aerostatic bearing.

Abstract: An electrothermal ink jet print head is constructed in layer structure, wherein the expansion direction of the ink vapor bubble is directed opposite to the ink-ejection direction. Each ink channel (16) of the ink jet print head is supplied with ink by flow throttles for a highest degree of effectiveness. For this purpose, a cover plate (1) is furnished with openings (2). The openings (2) join into an ink storage container. The openings (2) are connected with recess openings (25) to the ink channel (16) in the chip (11). Selectively, the recess openings (25) can be furnished in the chip (11) or in the cover plate (1). A method is provided for producing the recess openings (25).

Abstract: A miniature air bearing for supporting and guiding parts has a bearing surface of monocrystalline silicon. Nozzles are formed on the bearing surface by means of anisotropic etching for feeding air.

Abstract: An ink writing head comprising ink ejection channels and piezoelectric transducer elements allocated to the ink ejection channels, these transducer elements being supplied with writing fluid via supply lines, contains transducer elements comprising a first piezoelectrically excitable layer and a supporting layer firmly joined to the excitable layer. The piezoelectrically excitable layer comprises deflectable regions that are respectively subdivided into a peripheral and into a central region. For generating the needed excursion of the membrane, the regions of the membrane are driven such that the peripheral region is shortened, preferably by transversal contraction, and the central region is lengthened.

Abstract: A gas bearing is formed of a bearing member of sintered material. Sintered grains of a layer forming a desired bearing surface are deformed into the shape of a honeycomb in non-cutting fashion and are subsequently finely worked in cutting fashion, so that super-fine pores formed at corners of the honeycomb arise and which form nozzles.

Abstract: Apparatus for the ejection of ink droplets having a fluid filled channel having a discharge opening at one end, and a cross-sectional expansion at the other, so that pressure waves within the channel produce by a tubular transducer are reflected from the cross-sectional expansion with reversal of operational sign or polarity. Unipolar pulses having symmetrically and trailing edges excite the transducer, and the droplet is ejected from the discharge opening as a result of the superimposed directed and reflected pressure waves produced by the transducer.

Abstract: For generating individual droplets, an arrangement for an ink printer device comprises conductor loops as drive elements, the middle parts thereof lying in a common ink chamber and being movable therein under the influence of a magnetic field dependent on a change of current flux through a conductor loop; the conductor loops are fashioned of webs in a terminating plate, these webs being separated by columns having capillary action; every movable middle part includes a breach which forms a discharge opening; the terminating plate combines the function of the drive elements, of the nozzle plate and of an ink tight cover of the ink printer device.