Abstract: The present invention provides an electrophotosensitive material comprising a conductive substrate and a photosensitive layer provided on the conductive substrate, the photosensitive layer comprising a specific hole transferring material and/or electron transferring material and a binding resin of a polyester resin which is a substantially linear polymer obtained by using a specific dihydroxy compound represented by the general formula (1): wherein R1 is an alkylene group having 2 to 4 carbon atoms; and R2, R3, R4 and R5 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group or the like. This photosensitive material is improved in sensitivity, and is also superior in adhesion to conductive substrate as well as mechanical strength such as wear resistance, etc.

Abstract: The present invention provides a naphthoquinone derivative represented by the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone derivative as an electron transferring material has high sensitivity.

Abstract: The present invention provides a naphthoquinone derivative represented by the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are as defined in the specification. An electrophotosensitive material containing this naphthoquinone derivative as an electron transferring material has high sensitivity.

Abstract: The present invention provides an electrophotosensitive material comprising a conductive substrate and a photosensitive layer provided on the conductive substrate, the photosensitive layer comprising a specific hole transferring material and/or electron transferring material and a binding resin of a polyester resin which is a substantially linear polymer obtained by using a specific dihydroxy compound represented by the general formula (1): ##STR1## wherein R.sup.1 is an alkylene group having 2 to 4 carbon atoms; and R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group or the like. This photosensitive material is improved in sensitivity, and is also superior in adhesion to conductive substrate as well as mechanical strength such as wear resistance, etc.

Abstract: A drive device for a sewing machine comprises a high speed main motor having a power transmitting flywheel, and a low speed auxiliary motor having a power transmitting pulley. The power transmitting flywheel and the power transmitting pulley being mounted through a one-way clutch on the upper shaft of the sewing machine.

Abstract: A black photoconductive toner having sensitivity to light in the wavelength range of semiconductor lasers, the toner containing a resinous binder, photoconductive material, a sensitizer, and a perylene black pigment or yellow, magenta, or cyan quinone dyes.

Abstract: A photoconductive toner of the present invention contains a resin binder, zinc oxide, and a dye for sensitization of the zinc oxide, the sensitizer dye being represented by the following formula (1): ##STR1## wherein, X.sup.1 to X.sup.8 represent hydrogen or methoxy groups with a proviso that at least one of X.sup.1 to X.sup.8 represents a methoxy group, R.sup.1 and R.sup.2 are independently alkyl groups or derivatives thereof, and n is an integer. A photoconductive toner of the present invention satisfies requirements for both sensitivity and coloration, and, moreover, possesses high photosensitivity in the laser wavelength region as compared with conventional toners.

Abstract: Disclosed is a photosensitive toner sensitive to light with wavelengths in the range of 600 to 700 nm, which includes zinc oxide, a sensitizing dye, and a resinous binder. The sensitizing dye is a cyanine dye which is represented by the following general formula (I): ##STR1## R is CH.sub.3, C.sub.2 H.sub.5, n-C.sub.4 H.sub.9, n-C.sub.7 H.sub.15, CH.sub.2 COOH, C.sub.2 H.sub.4 COOH or allyl, and X is I, Cl, Br, NO.sub.3 or tolylsulfonyl.

Abstract: An apparatus for picking up and feeding, one by one, workpieces which are stacked in a guide, such as shirt cuffs or the like having an inconsistent thickness. A pair of delivery rollers is rotated so as to slacken the lowermost workpiece so that the latter is readily drawn from the guide by a pickup means for supply to an automatic sewing station.