Ink supply device for mimeographing machine

Claim 2

An ink supply device, in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means normally locking said hook member against movement; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member, only when said hook member has been released by said lock means, to actuate said operation member to actuate said pump; and means operable, each time the stack height has been reduced by a predetermined number of sheets, to release said lock means from said hook member for one such actuation of said pump and then to re-engage said lock means with said hook member after a predetermined angular movement of said printing cylinder; whereby ink is supplied to said printing cylinder, during operation of the mimeographing machine, only responsive to printing of a predetermined number of sheets.

Claim 3

The combination, as claimed in claim 1, in which said hook member operating means comprises an actuation cam rotatable in accordance with rotation of said printing cylinder, a pivotally mounted follower pivoted by said cam, a pivotally mounted actuation member pivotal by said follower, and a locking member providing for pivotal movement of said actuation member when the stack height has been reduced by said predetermined number of copy sheets.

Claim 4

The combination, as claimed in claim 1, including detecting means operatively associated with said sheet feeding means and controlling said hook member operating means; said detecting means providing for operation of said hook member operating means only when a copy sheet is fed between said printing cylinder and said impression roller.

Claim 5

An ink supply device in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means operable to lock said hook member against movement when the copy sheet stack has a predetermined height, said lock means being releasable from said hook member after the stack height has been reduced by a predetermined number of copy sheets; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member; said hook member operating means comprising an actuation cam rotatable in accordance with Rotation of said printing cylinder, a pivotally mounted follower pivoted by said cam, a pivotally mounted actuation member pivotal by said follower, and a locking member providing for pivotal movement of said actuation member when the stack height has been reduced by said predetermined number of copy sheets; means pivotally connecting said hook member to said actuation member; a spring biasing said hook member to move in a direction to engage said operation member; and a pin engaging said hook member and preventing such movement of said hook member; whereby, said actuation member is pivoted, said hook member pivots both around the axis of said actuation member and about it own pivotal mounting, so that said hook member can be brought into engagement with said operation member.

Claim 6

An ink supply device in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means operable to lock said hook member against movement when the copy sheet stack has a predetermined height, said lock means being releasable from said hook member after the stack height has been reduced by a predetermined number of copy sheets; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member; said hook member operating means comprising an actuation cam rotatable in accordance with Rotation of said printing cylinder, a pivotally mounted follower pivoted by said cam, a pivotally mounted actuation member pivotal by said follower, and a locking member providing for pivotal movement of said actuation member when the stack height has been reduced by said predetermined number of copy sheets; means pivotally connecting said hook member to said actuation member; a spring biasing said hook member to move in a direction to engage said operation member; and a pin engaging said hook member and preventing such movement of said hook member; whereby, said actuation member is pivoted, said hook member pivots both around the axis of said actuation member and about it own pivotal mounting, so that said hook member can be brought into engagement with said operation member.

Claim 7

The combination as claimed in claim 4, including an adjustable ink supply regulating member carrying said pin; and an operating member for said regulating member accessible from the exterior of the mimeographing machine; whereby the angle through which said hook member pivots relative to said actuation member can be varied by adjusting said regulating member from a point outside the mimeographing machine.

Claim 8

The combination as claimed in claim 5, in which said regulating member comprises a lever pivoted intermediate its ends, said pin being mounted at a first end of said lever; the opposite end of said lever having an arcuate extension formed with an arcuate slot; and a fixed pin engaged in said slot and limiting angular movement of said regulating member; said arcuate extension carrying indicia arranged along said slot.

Claim 9

An ink supply device, in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means operable to lock said hook member against movement when the copy sheet stack has a predetermined height, said lock means being releasable from said hook member after the stack height has been reduced by a predetermined number of copy sheets; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member; said operation member comprising a lever pivotally mounted intermediate its ends and having one arm operatively connected to said pump; said hook member comprising a pivotally mounted lever having a hook on its free end; said operation member carrying a pin engageable by said hook; and spring means interconnecting the other arm of said operation member and said hook member.

Claim 10

An ink supply device, in combination with a mimeographing machine having a printing cylinder, a tray supporting a stack of copy sheets, an impression roller operable to press copy sheets against the printing cylinder, and sheet feeding means operable to feed copy sheets from the stack between the impression roller and the printing cylinder, said device comprising, in combination, an ink supply line adjacent said cylinder to supply ink thereto; an ink supply pump operable to supply ink to said supply line; an operation member operable to actuate said pump; a hook member operable to engage and actuate said operation member to actuate said pump; lock means operable to lock said hook member against movement when the copy sheet stack has a predetermined height, said lock means being releasable from said hook member after the stack height has been reduced by a predetermined number of copy sheets; hook member operating means operable in accordance with operation of said printing cylinder to actuate said hook member; said operation member comprising a lever pivotally mounted intermediate its ends and having one arm operatively connected to said pump; said hook member comprising a pivotally mounted lever having a hook on its free end; said operation member carrying a pin engageable by said hook; and spring means interconnecting the other arm of said operation member and said hook member.