Abstract: In an electro-photographic copier of the type wherein an image is formed on an image-carrying sheet and is thereafter fixed by subjecting the sheet at a fixing station to the influence of heat, a combination comprises a heating arrangement at the fixing station for fixing an image on a sheet, and a conveyor arrangement for advancing the sheet through the station at a predetermined speed sufficient to permit the heating arrangement to fix the image on the sheet. An automatic de-actuating timing switch is employed to prevent charring of the sheet in the event that the latter is advanced through the fixing station at a speed lower than said predetermined speed.

Abstract: In an electro-photographic copier of the type wherein an image is formed on an image-carrying sheet and is thereafter fixed by subjecting the sheet at a fixing station to the influence of heat, a combination comprises a heating device at the fixing station for fixing an image on a sheet, and a conveyor device for moving the heating device relative to a sheet located in the fixing station at a predetermined speed sufficient to permit the heating device to fix the image on the sheet and also to prevent charring of the latter. A sheet-advancing device advances a sheet through the fixing station in direction opposite to the direction of movement of the conveyor device so as to increase the relative speed between the heating device and the advancing sheet. The movement of the heating device relative to the sheet prevents charring or burning of the sheet in the event that the sheet-advancing device malfunctions and advances a sheet at speeds lower than its normally rated speed, including zero speed, i.e.

Abstract: An apparatus for fixing toner images in which a radiating member is interposed between a near infrared red ray source and a path of movement of a support sheet bearing a toner image for producing far infrared rays. The radiating member is constructed with metal foils such that the foils form a large number of complicated paths for the near infrared rays from said source so that the rays are converted into heat after infinite repeated reflection. Air is sprayed through the complicated paths toward the sheet path to improve the fixing efficiency by an atmospheric heating in addition to the far infrared heating and further to prevent a combustion of the sheet in the event it is jammed.

Abstract: An apparatus for fusing toner images onto flexible support material in which the support material is transported in a path past a flash fusing lamp. The path is defined by an outer member and an inner member which guide the sheet past the flash fusing lamp. The inner member is made of a transparent material and the outer member is reflective. Warm air under pressure is used to advance the support material along its path and to crust the toner images facing inwardly toward the lamp to prevent offset and reduce energy requirements of the lamp to permanently fix the images to the support material.

Abstract: A flash fusing system for fusing toner images onto support material in which the support material is transported in a path past one or more flash fusing lamps. The flash fusing lamps are coupled to a circuit including a power supply voltage which is adjusted by an input from a sensing circuit including, a photodiode which measures the density of the unfused toner images on support material and converts the information into electrical signals. The electrical signals are supplied to an integrator which in turn is coupled to the power supply voltage of the circuit for energizing the flash lamps.

Abstract: The apparatus is for heat-fixing a toner image onto a support sheet in which the fixing of toner image is effected through both infrared radiation and direct contact with a heated surface of fixing roller in succession. An endless belt, having a transparency for infrared and trained over a pair of rollers, is disposed within a heat insulating casing, an upper run of the belt defining a path of movement of a toner image bearing support sheet to be fixed. An infrared radiator is disposed beneath the upper run of belt while a reflecting plate is disposed at the opposite side of the belt from the radiator with respect to the path. A fixing roller is disposed downstream of the radiator along the path for completing the fixing.

Abstract: In the field of the storage and retrieval of information, information records in the form of patterns of microspots of small size and high packing density are formed on a record web by the use of a focussed first laser beam, of a first level of intensity, to evaporate or burn away material to form microperforations in a thin layer of opaque first material on a web of transparent plastic. This invention covers the process of preparing a facsimile record of the pattern of microspots on a master record by exposing a second record web through the microperforations in the first web to a constant intensity focussed second laser beam of less intensity than the first level of intensity. Also means are shown for using an optical pattern on a first layer to control a laser to burn openings into an opaque underlying layer.

Abstract: A transprinting, bonding or fusing machine having a drum, a pressure roller arranged in contact with the surface thereof, an endless belt passing between the pressure roller and the drum and extending a part way around the surface of the drum, the drum being driven through the pressure roller. Electric heating elements are arranged exterior to the drum surface to direct heat on that part of the endless belt which is in contact with the drum surface, the material to be printed, bonded or fused passing between the endless belt and the surface of the drum.

Abstract: An original and a heat sensitive member are inserted as a sandwich into a copying machine and fed past a combined imaging and transfixing or fusing station where radiation is applied to the sandwich to thermally impart a latent image of the original to the heat sensitive member. Thereafter, the original is separated from the heat sensitive member and ejected from the machine. The heat sensitive member on the other hand, continues onwardly to a developing station where toner particles are applied to develop the latent image. Next, the heat sensitive member loops back towards the imaging and transfixing station, and a copy medium is brought into engagement with the developed image. The copy medium and the heat sensitive member are then passed into the imaging and transfixing or fusing station.

Abstract: A flash fusing apparatus for fusing toner images onto flexible support material in which the support material is transported in a cylindrical path encircling the flash fusing lamp which is positioned along longitudinal axis of the path. The cylindrical path is defined a cylindrical member encircling the flash fusing lamp. One or more disc members positioned along the cylindrical path are used to advance the support material along its path with the toner images facing inwardly toward the lamp to receive uniform radiation upon pulsing of the lamp which is activated by a sensing device.