Abstract: A case for fan includes a multilayer structure formed of cylindrical layers, including an outer shell and a liner layer. The liner layer is located radially inward from the shell. The liner layer is an auxetic material, which increases strength to increase effectiveness of case in a blade out condition.

Abstract: A paper processing device for marking original documents including a document feeder having a document singulation section, a printer for printing user determinable annotations on the document, an inverter to turn the document onto its first side and a stacker to stack the printed documents in their original order wherein printing the annotation is controlled by a print control computer. Preferably, the device includes a justifier for bringing the documents to a standard edge on which the printing is performed. The device also optionally includes a second side detector and a second printer for marking the second side of documents processed.

Abstract: An image processing device comprising a second side image sensor to determine whether the second side of a document also requires processing. The second side image sensor preferably uses a camera or measures reflected infrared light with an infrared photosensor. The invention relates to a wide variety of image processing devices such as copy machines, facsimile machines, annotators, scanners, printers, etc., which process documents. When the system detects an image or markings on the second side of a document it may merely alert the user or automatically process the second side of the document without additional user interaction.