Abstract: A therapeutic/preventive agent for cognitive dysfunctions, which comprises as an active ingredient an imide derivative of the following formula [1]: wherein Z is a group of the formula [2]: D is a group of —(CH2)p-A-(CH2)q—; G is ?N—, —CH—, etc.; and Ar is an aromatic heterocyclic group, etc.

Abstract: A therapeutic/preventive agent for cognitive dysfunctions, which comprises as an active ingredient an imide derivative of the following formula [1]: wherein Z is a group of the formula [2]: D is a group of —(CH2)p-A-(CH2)q—; G is ?N—, —CH—, etc.; and Ar is an aromatic heterocyclic group, etc.

Abstract: A therapeutic/preventive agent for cognitive dysfunctions, which comprises as an active ingredient an imide derivative of the following formula [1]: wherein Z is a group of the formula [2]: D is a group of —(CH2)p-A-(CH2)q—; G is ?N—, —CH—, etc.; and Ar is an aromatic heterocyclic group, etc.

Abstract: A therapeutic/preventive agent for cognitive dysfunctions, which comprises as an active ingredient an imide derivative of the following formula [1]: wherein Z is a group of the formula [2]: D is a group of —(CH2)p-A-(CH2)q—; G is ?N—, —CH—, etc.; and Ar is an aromatic heterocyclic group, etc.

Abstract: A therapeutic/preventive agent for cognitive dysfunctions, which comprises as an active ingredient an imide derivative of the following formula [1]: wherein Z is a group of the formula [2]: D is a group of —(CH2)p—A—(CH2)q—; G is =N—, —CH—, etc.; and Ar is an aromatic heterocyclic group, etc.

Abstract: A paper refeeding device incorporated in a copier for stacking one-sided paper sheets each carrying an image on one side thereof on an intermediate tray and then refeeding the paper sheets from the tray for forming an image on the other side thereof. In a two-sided copy mode operation, the device reduces the copying time while eliminating paper jam, missfeed and other troubles. The device stacks one-sided paper sheets stably on the intermediate tray and refeeds them without any skew. In addition, the device is simple in construction and implements automatic timing control.

Abstract: An image forming apparatus selectively loaded with a two-side unit and a paper cassette storing a stack paper sheets and selectively operable in a two-sided copy mode and a combined copy mode. The body of the apparatus incorporates at least an image forming section, an image fixing section, a paper transporting section, and a paper discharging section therein. An accommodating section is provided in a lower portion of the apparatus body for selectively accommodating either one of the two-side unit and paper cassette. The accommodating section has a bore open at a particular side where the apparatus is to be operated, and a guide potion for guiding the two-side unit and paper cassette. The two-side unit and paper cassette have the same external configuration.

Abstract: An electrophotographic copying machine includes a main housing and an internal frame which can be detachably mounted in position defined in the main housing. The internal frame supports a photosensitive member in the form of an endless belt and a grid electrode. The main housing is provided with a corona discharger comprised of a corona wire and a casing partly surrounding the corona wire to define an opening through which corona ions are emitted. When the internal frame is mounted in position in the main housing, the grid electrode comes to be located opposite to the opening thereby functioning as a part of the corona discharger. Thus, when the internal frame is dismounted, the opening of corona discharger is exposed thereby allowing easy access to the corona wire.

Abstract: A guide apparatus for guiding a movable contact glass, which serves as an original table in an electrophotographic copying machine, to a predetermined exposure position for slit exposure, without any inclination of the contact glass, comprising a drive member for reciprocating the contact glass in the exposure scanning direction and a guide member, which is shorter than the distance from the exposure position to the center of gravity of the contact glass at completion of the exposure scanning and whose upper surface at the exposure position is higher than the other upper surface thereof.The drive apparatus comprises a loop drive transmission member which is rotated in one direction and which substantially reciprocates the contact glass and can have a lock release apparatus capable of making the contact glass movable manually when the contact glass is stopped at its dead point.

Abstract: An electrophotographic process and apparatus of two revolutions/copy, wet developing type is provided in which a corona discharger provides the combined functions of a charging and an image transfer, and in which a combined developing and cleaning unit is used. The unit includes a combined developing and cleaning roller which is driven for rotation in different directions and at different speeds during the developing and the cleaning step.

Abstract: The apparatus comprises a driving mechanism for reciprocating a slider having a contact glass thereon, and a rotation control member which is associated with the driving mechanism and which makes one rotation per two rotations of a photoconductor drum and one reciprocating cycle of the slider. Through the rotation control member, a copying process can be controlled in association with the rotations of the photoconductor drum. The slider can be reciprocated freely when the copying machine is not in operation by the present known slider reciprocating driving apparatus. A stopper for stopping the forward movement of the slider without causing any adverse shock is provided.

Abstract: Two fixing rollers are mounted on shafts and rotated to pressingly feed a copy sheet therebetween to fix a toner image to the copy sheet. Spring force is applied to the ends of the shafts to urge the rollers together. The axes of the shafts define an acute angle therebetween to offset a tendency for the pressing force to decrease toward the center of the rollers due to deflection of the shafts and rollers. Feed rollers feed the copy sheet into the bite of the fixing rollers at a speed which is faster than the speed that the fixing rollers feed the copy sheet therebetween. The copy sheet is therefore fed through the fixing rollers in a slackened condition which prevents wrinkling of the copy sheet due to the angle between the shafts.

Abstract: A handle or knob is connected to laterally position parallel sheet edge guides so that the distance between the guides is equal to the width of a sheet to which a toner image is to be fixed by pressure rollers. The handle or knob is also connected to an adjustable spring assembly which presses the rollers together in such a manner that the spring force acting on the rollers is a function of the sheet width.