Abstract: An image recording apparatus which records an image of an original document on an image receiving sheet with the use of a photosensitive recording medium, the image receiving sheet having front and rear faces differing in reflection ratio. To detect error in sheet face orientation, a sheet face sensor unit is provided upstream of a pressure developing unit which discriminates a face of the image receiving sheet. The sensor unit includes a light emitting element for emitting light toward the face of the image receiving sheet and a light receiving element for receiving light emitted from the light emitting element and reflected on the face of the image receiving sheet.

Abstract: An image recording apparatus for recording an image on an elongated continuous form photosensitive recording medium fed along a recording medium feeding path is disclosed.

Abstract: An imaging device for forming a visible image by pressurizing and feeding an exposed recording sheet with a developing sheet detects that the recording sheet and the developing sheet are accurately overlapped with each other before the pressurizing operation is begun. The position of the sheets is monitored and the pressurizing rollers are controlled in accordance with the detected positions.

Abstract: An image recording apparatus for recording an image of an original on a developer sheet with the use of a microcapsule, in which the developer sheet and the microcapsule sheet having a surface coated with immense number of photosensitive and pressure-rupturable microcapsules are subjected to pressure development by a pair of pressurizing rollers. To ensure that the pressure development is performed under the condition where the developer sheet and the microcapsule sheet are superposed one on the other, the nip and retract timings of the pressurizing rollers are determined properly according to the present invention. For example, the developer sheet is conveyed at a speed asynchronous with the microcapsule conveying speed and the conveyance of the developer sheet is stopped after its leading edge is introduced between the rollers held in spaced apart condition.

Abstract: A digital filter of linear phase non-cyclic type comprises a shift register composed of serially connected delay elements with a specified delay time. The outputs from the individual delay elements are multiplied and added so that the output sampling frequency is twice that of the input sampling frequency which enters the shift register. The number of multiplications is significantly reduced by making the number of output lines from the delay elements to be odd and by placing adders between the shift register and the device for carrying out multiplications. An alternative method is to use read only memories instead of the means for carrying out multiplications.