US3782618A — Stock feeding device

Claim 1

Independent Claim 141 words

In a feed device for feeding stock into a machine; a frame, first and second feed rollers in opposed relation in said frame, intermittent drive means operatively connected to said first roller for driving said first roller intermittently for alternating feed and dwell periods thereof, and means operatively connected to said second roller and urging said second roller toward said first roller so that stock between said rollers is frictionally engaged thereby, said intermittent drive means having a driven input element rotatably mounted in said frame and an output element also rotatably mounted in said frame and operatively engaged by said input element and intermittently driven thereby, means connecting said output element with said first roller, and preload means including a flexible portion carried by said frame and adjustable therein for adjusting the lost motion between said input and output elements.

Claim 2

Dependent Claim 141 words

In a feed device for feeding stock into a machine; a frame, first and second feed rollers in opposed relation in said frame, intermittent drive means operatively connected to said first roller for driving said first roller intermittently for alternating feed and dwell periods thereof, and means operatively connected to said second roller and urging said second roller toward said first roller so that stock between said rollers is frictionally engaged thereby, said intermittent drive means having a driven input element rotatably mounted in said frame and an output element also rotatably mounted in said frame and operatively engaged by said input element and intermittently driven thereby, means connecting said output element with said first roller, and preload means including a flexible portion carried by said frame and adjustable therein for adjusting the lost motion between said input and output elements.

Claim 3

Dependent Claim 91 words

In a device for feeding strip stock into a machine; a pair of feed rollers adapted to receive therebetween the stock to be fed, means urgiNg said rollers toward each other for frictional engagement of stock thereby, means for driving at least one of said rollers intermittently for alternate feed and dwell periods of stock engaged by the rollers, and positive displacement fluid means operable during each swell period of the stock for moving said rollers away from each other thereby at least momentarily to release the stock from the rollers.

Claim 4

Dependent Claim 91 words

In a device for feeding strip stock into a machine; a pair of feed rollers adapted to receive therebetween the stock to be fed, means urgiNg said rollers toward each other for frictional engagement of stock thereby, means for driving at least one of said rollers intermittently for alternate feed and dwell periods of stock engaged by the rollers, and positive displacement fluid means operable during each swell period of the stock for moving said rollers away from each other thereby at least momentarily to release the stock from the rollers.

Claim 5

Dependent Claim 77 words

A feed device according to claim 2 in which said feed device includes a rotatable input shaft, a cam on said input shaft, a first piston actuated by said cam in response to rotation of said input shaft, a second piston connected to one of said rollers, and a closed hydraulic path extending between said pistons for movement of said second piston in roller separating direction in response to actuation of said first piston by said cam.

Claim 6

Dependent Claim 98 words

In a feed device for feeding stock into a machine; a frame, first and second feed rollers in opposed relation in said frame, intermittent drive means operatively connected to said first roller for driving said first roller intermittently for alternating feed and dwell periods thereof, and hydraulic means operatively connected to said second roller for forcing said second roller toward and away from said first roller whereby stock between said rollers is frictionally engaged and disengaged thereby, said hydraulic means including positive displacement means for producing the pressure to force said second roller away from said first roller.

Claim 7

Dependent Claim 98 words

In a feed device for feeding stock into a machine; a frame, first and second feed rollers in opposed relation in said frame, intermittent drive means operatively connected to said first roller for driving said first roller intermittently for alternating feed and dwell periods thereof, and hydraulic means operatively connected to said second roller for forcing said second roller toward and away from said first roller whereby stock between said rollers is frictionally engaged and disengaged thereby, said hydraulic means including positive displacement means for producing the pressure to force said second roller away from said first roller.

Claim 8

Dependent Claim 135 words

A feed device according to claim 4 in which said drive means comprises a first element which rotates continuously and a second element operatively engaged by said first element and indexed thereby as said first element rotates, a first shaft supporting said first element, a second shaft supporting said second element, said frame comprising first portions supporting said first shaft and second portions supporting said second shaft, said first portion being integrally fixed in said frame, web means in the frame integral with the frame and said second portions and yieldable to permit movement of said second portions toward and away from said first portions, and means in said frame engaging said second portions and adjustable to adjust the spacing between said second portions and said first portions to eliminate lost motion between said elements.

Claim 9

Dependent Claim 144 words

A feed device according to claim 4 in which said drive means comprises a first element which rotates continuously and a second element operatively engaged by said first element and indexed thereby as said first element rotates, a first shaft supporting said first element, said frame comprising first portions supporting said first shaft and second portions supporting said second shaft, said first portion being integrally fixed in said frame, web means in the frame integral with the frame and said second portions and yieldable to permit movement of said second portions toward and away from said first portions, and screws threaded into said frame and engaging said second portions on the sides thereof which face away from said first portion and adjustable in the frame to adjust the spacing between said second portions and said first portions to eliminate lost motion between said elements.

Claim 10

Dependent Claim 56 words

A feed device according to claim 4 wherein said hydraulic means includes a source of fluid under pressure, an actuator connected to said second roller, said actuator having an area responsive to fluid pressure to force said second roller away from said first roller, and valve means disposed between said fluid source and said actuator area.

Claim 11

Dependent Claim 53 words

A feed device according to claim 7 in which said valve means is a normally centered blocked center reversing valve, said valve in the centered position blocking fluid flow through the valve and in one shifted position connecting said area to said source and in another shifted position connecting said area to exhaust.

Claim 12

Dependent Claim 64 words

A feed device according to claim 7 which includes a cylinder and a piston therein, a conduit connectinG said cylinder to said actuator area whereby movement of said piston in the cylinder will displace fluid from the cylinder to the area, and means driven by said intermittent drive means for moving said piston in said cylinder during each dwell period of said first roller.

Claim 13

Dependent Claim 81 words

A feed device according to claim 7 which includes a cylinder connected in closed circuit with said actuator area, a piston in said cylinder movable in one direction therein to displace fluid from the cylinder to the actuator area, said intermittent drive means including a continuously driven input shaft, and a cam on said input shaft operatively engaging said piston and operable during each dwell period of said first roller to move said piston in said one direction in said cylinder.

Claim 14

Dependent Claim 68 words

A feed device according to claim 4 in which said hydraulic means operatively connected to said second roller comprises a piston having a first area responsive to fluid pressure to urge said second roller toward said first roller and a second area opposed to said first area, means for supplying pressure fluid continuously to said first area, and other means for supplying pressure fluid to said second area.

Claim 15

Dependent Claim 30 words

A feed device according to claim 11 in which said other means comprises a source of fluid under pressure and a shiftable valve between said source to said second area.

Claim 16

Dependent Claim 38 words

A feed device according to claim 11 in which said other means comprises fluid displacing means operated by said drive means so as to displace fluid to said second area during each dwell period of said first roller.

Claim 17

Dependent Claim 45 words

A feed device according to claim 12 which includes means sensitive to buckling of the stock being on the outgoing side of said device and adapted for shifting said valve into position to cause a supply of fluid from said source to said second area.

Claim 18

Dependent Claim 87 words

A feed device according to claim 11 which includes a piston connected to said second roller, the end of said piston facing away from said second roller forming said first area, a cylinder in which said piston is reciprocable and forming a part of said frame, a bore extending into said piston from the end opposite said second roller, a piston element slidable in said bore, and compression spring means between said piston and the side of said piston element which faces away from said first area.

Claim 19

Dependent Claim 25 words

A feed device according to claim 15 in which said piston comprises a shoulder facing away from said first area and forming said second area.

Claim 20

Dependent Claim 115 words

In a feed device for feeding stock into a machine; a frame, first and second feed rollers in opposed relation in said frame, intermittent drive means operatively connected to said first roller for driving said first roller intermittently for alternating feed and dwell period thereof, said drive means provided with a driven input element rotatably mounted in said frame and an output element also rotatably mounted on said frame and operatively engaged by said input element and intermittently driven thereby, means connecting said output element with said first roller, and preload means carried by said frame and including a flexible portion having adjustment means for adjusting the lost motion between said input and output elements.

Claim 21

Dependent Claim 115 words

In a feed device for feeding stock into a machine; a frame, first and second feed rollers in opposed relation in said frame, intermittent drive means operatively connected to said first roller for driving said first roller intermittently for alternating feed and dwell period thereof, said drive means provided with a driven input element rotatably mounted in said frame and an output element also rotatably mounted on said frame and operatively engaged by said input element and intermittently driven thereby, means connecting said output element with said first roller, and preload means carried by said frame and including a flexible portion having adjustment means for adjusting the lost motion between said input and output elements.

Claim 22

Dependent Claim 71 words

A feed device according to claim 17 in which said drive means includes a first shaft supporting said first element, a second shaft supporting said second element, said frame comprising first portions supporting said first shaft and second portions supporting said second shaft with relative flexibility provided between said first and second portions of said frame, said preload means adapted to move said first and second portions relatively to each other.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-12-31	1977-07-02	1978-01-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-12-31	1981-07-02	1982-01-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-12-31	1985-07-02	1986-01-01	$7700.00	Window Closed / Lapsed

Stock feeding device

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