Abstract: Constant volume multizone heating/air conditioning systems are converted to variable volume air conditioning systems. Energy conservation is achieved by converting the fan drive from one requiring constant volume air flow. Instead, the volume of air flow is governed by relative heating or cooling needs. Further, mixture of heated and cooled air to achieve the desired temperature is no longer required. Temperature sensors in a zone being heated/cooled detect actual temperature there. When the actual temperature indicates a need for cooling, the vent vanes of the system are opened and the heating vent vanes are closed. The fan speed and volume of air flow are then controlled to provide the required amounts of cooled air. Conversely, when heating is sensed to be needed, the heating and cooling air vent vanes positions are reversed and the fan speed regulated to supply the requisite amount of heated air.

Abstract: An automatic document imaging mode selection system in a system for generating electronic images of documents, in which documents may be variously fed or registered on a document imaging platen with a plural mode automatic document handling system. Various document handling and/or image scanning modes of operation are automatically selected from among various available potential such modes by accessing various document handling status information and/or sensor inputs, and coordinating that information to automatically select an optimum such mode where the operator has not specifically selected a mode. This may further include automatically determining whether or not to conduct a special pre-scan cycle before image scanning is initiated, and/or taking into consideration inferences as to whether or not the document(s) had been previously imaged. It may further or additionally include automatically changing the registration or scanning position for the particular document in accordance with the mode selection.

Abstract: An electronic reprographic apparatus, including a method for increasing the speed of manual or semi-automatic imaging of signature-type original documents, having the ability to selectively control the areas of the documents to be imaged. In particular, the system enables the user to identify the type of input document, including size and image cropping dimensions, thereby eliminating the potential for imaging beyond document edges or in bound document gutter regions. In addition, the system is suitable for scanning both page sides of a first signature-type document on the first pass of the scan array and is capable of scanning a second signature-type document on the reverse or return pass. Furthermore, the system implements the scanning operation with a center registration technique, facilitating the registration of bound documents.

Abstract: A diagnostic test process is provided for a visual verification of the spatial illumination characteristics of an illumination system used in a raster input scanner (RIS) system. A calibration reference strip is illuminated by the RIS scanning lamp and the reflected image is detected by a photosensor array. The output data from the photosensor is sampled at predetermined time intervals with each sampling being displayed as a video illumination profile at a display screen. The profile is superimposed on a calibration grid with indicia which allow verification that the lamp calibration is still valid. An out of spec calibration display prompts an operator or tech rep to initiate a recalibration routine or to replace the lamps or possibly clean the optical system components.

Abstract: A method and apparatus for operating an electronic reprographic system upon detection of a fault are described. Original documents of a job to be printed are scanned to provide images for storage. When scanning is interrupted, the last captured image is stored and selectively displayed. If scanning is not completed before the interruption, the system is monitored for the occurrence of a fault before scanning is resumed. The detection of a fault occurrence requires clearance of the paper path before scanning operation can be resumed. If scanning is completed, printer operation is enabled to provide image output. Partially completed scan jobs resulting from scanner interruption are saved in operator accessible memory.

Abstract: An electronic printing system for printing bound documents such as books in which the pages of the document are placed face down in registered position on the platen of a scanner programmed to scan either or both sides of the page and provide image signals representative of the image scanned, and a printer programmable to either print both sides of a page on a common print media sheet or on separate print media sheets.

Abstract: In an electronic imaging system in which a document is electronically imaged on a platen by a scanning electronic imager, a document for which manual handling is desired is manually positioned in a special manual registration position on the platen in which one corner of the document underlies a unique signal generating optical indicia positioned over that corner of the platen. Preferably, this optical indicia is a uniquely numbered bar code pattern on a stationary baffle, or other overlying surface, upstream of the document feeder platen transport, and preferably located in a start of scan area. The electronic imager is at least partially optically occluded from reading that unique bar code pattern by a document present in that manual registration position. (A document for which automatic feeding is desired may be placed in a document feeder and fed thereby onto the platen into a different registration position in which no portion of that document is interposed between that bar code and the imager.

Abstract: An electronic printing system for scanning signature pages for signature jobs in which the pages of the document are placed face down in registered position on the platen of a scanner such that the signature images are side by side in the fast scan direction in order to enable an array to view both images concurrently on relative movement between the array and the platen in a slow scan direction.