Web transport

Claim 2

A transport for a web having registration holes, comprising: a drive surface, urging means normally urging the web into contact with said drive surface, at least one registration pin moving synchronously with said drive surface and dimensioned and positioned to freely enter a registration hole in the web, first means operative during the time that a registration pin is in a registration hole to prevent said urging means from urging the web into contact with said drive surface, and second means also operative during the time that a registration pin is in a registration hole for moving the web so that an edge of the registration hole engages the registration pin, whereby the web is accurately registered.

Claim 3

A transport as defined in claim 1, wherein said drive surface and said urging means include: a capstan, and a pinch roller, between which the web is guided in a substantially straight path, said pinch roller normally urging the web into contact with said capstan so that web is driven by the capstan.

Claim 4

A transport as defined in claim 2 wherein said registration pins extend radially from said capstan.

Claim 5

A transport as defined in claim 2 wherein said first means includes a cam rotated in synchronism with said capstan.

Claim 6

A transport as defined in claim 4 wherein said second means includes a switch actuated by said cam, a solenoid activated by said switch, and a web tensioning device operated by said solenoid.

Claim 7

A transport as defined in claim 2 wherein the center to center distance between a registration pin and a circumferentially adjacent registration pin is less than the center to center distance between registration holes in the web but greater than the distance between the trailing edge of one registration hole and the leading edge of the following registration hole.

Claim 8

A transport as defined in claim 2 wherein said capstan is continuously rotating.

Claim 9

A transport as defined in claim 2 wherein said first and said second means are operative solely during the time that a registration pin is in a registration hole.

Claim 10

A transport for a web containing registration holes, comprising: a continuously rotating capstan, and a pinch roller, between which the web is guided in a substantially straight path, said pinch roller normally urging the web into contact with the capstan so that the web is driven by the capstan, at least one registration pin extending radially from said capstan and dimensioned to freely enter registration holes in the web and spaced at a center to center distance from a circumferentially adjacent registration pin less than the center to center distance between registration holes in the web and greater than the distance between the trailing edge of one registration hole and the leading edge of the following registration hole, a cam rotated in synchronism with said capstan for moving said pinch roller away from the web duRing the time that a registration pin is in a registration hole, a switch actuated by said cam also during the time that a registration pin is in a registration hole, a solenoid activated by said switch, and a film tension device operated by said solenoid to pull the web in the forward direction causing the trailing edge of the registration hole to engage the registration hole.

Claim 11

A transport for a web containing registration holes, comprising: a continuously rotating capstan, and a pinch roller, between which the web is guided in a substantially straight path, said pinch roller normally urging the web into contact with the capstan so that the web is driven by the capstan, at least one registration pin extending radially from said capstan and dimensioned to freely enter registration holes in the web and spaced at a center to center distance from a circumferentially adjacent registration pin less than the center to center distance between registration holes in the web and greater than the distance between the trailing edge of one registration hole and the leading edge of the following registration hole, a cam rotated in synchronism with said capstan for moving said pinch roller away from the web duRing the time that a registration pin is in a registration hole, a switch actuated by said cam also during the time that a registration pin is in a registration hole, a solenoid activated by said switch, and a film tension device operated by said solenoid to pull the web in the forward direction causing the trailing edge of the registration hole to engage the registration hole.