US 5,842,397 A · Punching apparatus and punching method for cylindrical inner surface scanner

Abstract

A punching transport apparatus attached to an end surface a cylindrical inner surface drum includes two transport units which are connected with a pulse motor, two belts, and two pulleys so as to be able to move in synchronism to each other. The two transport units are linked to two punching units through linkage blocks. Transport carriers of the transport units are threadingly engaged with ball screws which are linked to the pulleys so that the transport carriers are loosely fitted to guide rails. Receiving an input signal which is entered in accordance with a plate edge distance which is determined by the specifications of a printer, a controller drives the pulse motor under the control of a pulse count. As a result, from an origin position which is determined in accordance with a condition which is detected by an origin sensor, the two transport units and the two punching units move in a central axis direction X.

Claims12

Dependent claims

A punching apparatus for use in a cylindrical inner surface scanner in which a scanning head is moved within an effective drawing area in a central axis direction of a cylindrical inner surface drum so that a light beam from said scanning head, which is modulated by an image signal, sweeps over an inner surface of said cylindrical inner surface drum in a circumferential direction of said cylindrical inner surface drum, thereby exposing a photosensitive material which is mounted on said inner surface and drawing an image on said photosensitive material, said punching apparatus comprising:

a punching unit including a punch for punching a hole in said photosensitive material;
punching unit transport means attached to an end portion of said cylindrical inner surface drum of said central axis direction, said punching unit transport means moving said punching unit in said central axis direction;
and
control means for controlling said punching unit transport means so that said punching unit is moved in said central axis direction in accordance with a plate edge distance, which is a distance between one end of said photosensitive material, which is approximately parallel to said circumferential direction, and a punching position which is determined in relation to a subsequent process, thereby registering said punch to said punching position.

1 more element

punching unit including a punch for punching a hole in said photosensitive material;
a punching unit transport device attached to an end portion of said cylindrical inner surface drum of said central axis direction, said punching unit transport device moving said punching unit in said central axis direction;
and
a control device for controlling said punching unit transport device so that said punching unit is moved in said central axis direction in accordance with a plate edge distance, which is a distance between one end of said photosensitive material, which is approximately parallel to said circumferential direction, and a punching position which is determined in relation to a subsequent process, thereby registering said punch to said punching position.

1 more element

Dependencies are inferred from the claim text.

Punching apparatus and punching method for cylindrical inner surface scanner

Life of this patent

Punching apparatus and punching method for cylindrical inner surface scanner

Life of this patent

Abstract

Claims12