Abstract: An incoming message automatic reporting system installed in the telephone line of a fax machine to automatically notify the addressee after the sender has sent a fax message to the fax machine, the system including a microprocessor, a multi-frequency decoder, a multi-frequency signal generator, a voice IC, a telephone line interface, and three electric connectors, wherein when the sender inputs the code number of a sub-telephone set, the code number is simultaneously stored in the microprocessor, when the sender's fax message is completely received by the addressee's fax machine, the microprocessor picks up the stored code number to dial the sub-telephone set of the addressee, and drives the voice IC to send a voice message to the addressee when the addressee picks up the handset of the sub-telephone set, informing the addressee of the incoming of a fax message.

Abstract: A mobile copy machine extension unit including a casing having a paper tray for holding blank sheets of paper, a front cover and a back cover mounted on the casing and spaced by a loading space for letting a mobile copy machine to be loaded between the front and back cover, a reversible motor, sheet-transfer rollers turned by the reversible motor through a set of gears to carry individual blank sheets of paper into the mobile copy machine through a paper inlet on the front cover, an idle wheel turned by the reversible motor through a belt transmission to carry copied sheets of paper out of the mobile copy machine to a paper deck on the casing through a paper outlet on the back cover.

Abstract: This invention discloses a sheet feeder which comprises a plurality of micro switches, a light sensitive switch, and a controller board having an erasable programmable read only memory (EPROM) for receiving signals from the micro switch and sending pre-programmed responses to control the movement a pair of motors which in turn cause a paper carrying elevator to ascend and send the feed paper sheets into a laser printer. The capacity of the sheet feeder of this invention is several times that of a conventional tray-shaped sheet feeder. The front face of this sheet feeder is provided with a receiving rack, each of whose two ends is furnished with an oblong hole. A sheet guide is pivotally connected to the sheet feeder using two small round bolts inserted through the two oblong holes respectively. The height of the sheet guide can be adjusted within a given limit to accommodate the varying feeding port height of a wide variety of laser printers.