Engineering drawing electrophotocopier

Claim 2

A machine for making an electrophotocopy of an original having a certain length including in combination a drum having a photoconductive surface, a membrane having two surfaces, one membrane surface being disposed in contact with the photoconductive surface, the original being disposed in contact with the other membrane surface, and means for directing light through the original and the membrane to the photoconductive surface, the circumference of the drum surface being less than said length.

Claim 3

A machine for making an electrophotocopy of an original including in combination a photoconductive surface, a first membrane having two surfaces, one membrane surface being disposed in contact with the photoconductive surface, the original being disposed in contact with the other membrane surface, a second membrane, the second membrane being disposed in contact with the original, means for directing light through the second membrane and the original and the first membrane to the photoconductive surface, and means for moving the surface and the two membranes and the original at the same linear velocity.

Claim 4

A machine for making an electrophotocopy of an original including in combination a photoconductive surface, a first membrane having two surfaces, one membrane surface being disposed in contact with the photoconductive surface, the original being disposed in contact with the other membrane surface, a second membrane, the second membrane being disposed in contact with the original, means for directing light through the second membrane and the original and the first membrane to the photoconductive surface, and means for moving the surface and the two membranes and the original at the same linear velocity.

Claim 5

A machine for making an electrophotocopy of an original including in combination a drum having an axis and an exterior photoconductive surface, means for charging said surface, and means for creating on said surface an electrostatic image by contact exposure of the original, said contact exposure means including a fluorescent lamp positioned to direct light toward the drum axis.

Claim 6

A machine for making an electrophotocopy of an original including in combination a drum having an axis and an exterior photoconductive surface, means for charging said surface, and means for creating on said surface an electrostatic image by contact exposure of the original, said contact exposure means including a fluorescent lamp positioned to direct light toward the drum axis.

Claim 7

A machine for making an electrophotocopy of an original including in combination a photoconductive surface, means for charging said surface, and means for creating on said surface an electrostatic image by contact exposure of the original, said contact exposure means including a fluorescent aperture lamp, a fixed aperture comparable in size to that of the lamp, and means for rotating the lamp to control the extent of exposure of said surface.

Claim 8

A machine for making an electrophotocopy of an original including in combination a photoconductive surface, means for charging said surface, and means for creating on said surface an electrostatic image by contact exposure of the original, said contact exposure means including a fluorescent aperture lamp, a fixed aperture comparable in size to that of the lamp, and means for rotating the lamp to control the extent of exposure of said surface.

Claim 9

A machine for making an electrophotocopy of an original including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools and having a portion on one side thereof which contacts said surface, said original being disposed in contact with said portion of the membrane on the other side thereof, and means for moving said surface and the membrane and the original at the same linear velocity.

Claim 10

A machine for making an electrophotocopy of an original including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools and having a portion on one side thereof which contacts said surface, said original being disposed in contact with said portion of the membrane on the other side thereof, and means for moving said surface and the membrane and the original at the same linear velocity.

Claim 11

An electrophotocopier including in combination a drum having a photoconductive surface, a first and a second spool, a membrane having a first and a second surface, said membrane being wound about said spools, a first and a second and a third roller, the membrane passing from the first spool successively around the first and over the second and third rollers to the second spool, the second and third rollers each contacting the second surface of the membrane and holding that portion of the first surface therebetween in contact with the photoconductive surface, and the first roller contacting the first surface of the membrane over an appreciable central angle thereof.

Claim 12

An electrophotocopier including in combination a drum having a photoconductive surface, a first and a second spool, a membrane having a first and a second surface, said membrane being wound about said spools, a first and a second and a third roller, the membrane passing from the first spool successively around the first and over the second and third rollers to the second spool, the second and third rollers each contacting the second surface of the membrane and holding that portion of the first surface therebetween in contact with the photoconductive surface, and the first roller contacting the first surface of the membrane over an appreciable central angle thereof.

Claim 13

An electrophotocopier including in combination a drum having a photoconductive surface, a first and a second spool, a membrane having a first and a second surface, the membrane being wound about said spools, a portion of the first surface of the membrane contacting said photoconductive surface, a first plurality of rollers, a second plurality of rollers, a further roller, the membrane passing from the first spool over each roller of the first plurality and successively around the further roller to said contacting portion and passing from said contacting portion over each roller of the second plurality to the second spool, each roller of the first and second pluralities contacting the second surface of the membrane, and the further roller contacting the first surface of the membrane over an appreciable central angle thereof.

Claim 14

An electrophotocopier including in combination a drum having a photoconductive surface, a first and a second spool, a membrane having a first and a second surface, the membrane being wound about said spools, a portion of the first surface of the membrane contacting said photoconductive surface, a first plurality of rollers, a second plurality of rollers, a further roller, the membrane passing from the first spool over each roller of the first plurality and successively around the further roller to said contacting portion and passing from said contacting portion over each roller of the second plurality to the second spool, each roller of the first and second pluralities contacting the second surface of the membrane, and the further roller contacting the first surface of the membrane over an appreciable central angle thereof.

Claim 15

An electrophotocopier including in combination a drum having a photoconductive surface, a first and a second spool, a membrane wound about said spools, a first plurality of rollers, a second plurality of rollers, the membrane passing from the first spool over each roller of the first plurality in a path describing generally an expanding spiral, the membrane passing over each roller of the second plurality to the second spool in a path describing generally a contracting spiral, the membrane extending from the first plurality of rollers to the second plurality of rollers and including a portion contacting the photoconductive surface, the rollers of the first and second pluralities being so disposed as to provide said respective spiral paths.

Claim 16

An electrophotocopier including in combination a drum having a photoconductive surface, a first and a second spool, a membrane wound about said spools, a first plurality of rollers, a second plurality of rollers, the membrane passing from the first spool over each roller of the first plurality in a path describing generally an expanding spiral, the membrane passing over each roller of the second plurality to the second spool in a path describing generally a contracting spiral, the membrane extending from the first plurality of rollers to the second plurality of rollers and including a portion contacting the photoconductive surface, the rollers of the first and second pluralities being so disposed as to provide said respective spiral paths.

Claim 17

An electrophotocopier including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools, means for moving the photoconductive surface with a certain linear velocity, means selectively operable to bring a portion of the membrane into contact with the photoconductive surface and to move the membrane in the same direction and with the same velocity as the photoconductive surface, and means selectively operable to bring the membrane out of contact with the photoconductive surface and to move the membrane in a direction opposite to that of the photoconductive surface.

Claim 18

An electrophotocopier including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools, means for moving the photoconductive surface with a certain linear velocity, means selectively operable to bring a portion of the membrane into contact with the photoconductive surface and to move the membrane in the same direction and with the same velocity as the photoconductive surface, and means selectively operable to bring the membrane out of contact with the photoconductive surface and to move the membrane in a direction opposite to that of the photoconductive surface.

Claim 19

An electrophotocopier including in combination, a drum having a photoconductive surface, a first membrane, a second membrane, means including a pair of rollers for supporting both membranes, and means for selectively moving the pair of rollers toward and away from the photoconductive surface.

Claim 20

An electrophotocopier including in combination, a drum having a photoconductive surface, a first membrane, a second membrane, means including a pair of rollers for supporting both membranes, and means for selectively moving the pair of rollers toward and away from the photoconductive surface.

Claim 21

An electrophotocopier including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools, and means for selectively moving the spools toward and away from the photoconductive surface.

Claim 22

An electrophotocopier including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools, and means for selectively moving the spools toward and away from the photoconductive surface.

Claim 23

An electrophotocopier including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools, means for selectively moving the spools toward and away from the photoconductive surface, and means for maintaining the membrane under a uniform tension between the spools.

Claim 24

An electrophotocopier including in combination a drum having a photoconductive surface, a pair of spools, a membrane wound about said spools, means for selectively moving the spools toward and away from the photoconductive surface, and means for maintaining the membrane under a uniform tension between the spools.