Apparatus for drilling drive pin holes in rewind roll cores

Claim 2

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores for receiving drive pins for a first standard diameter rewind roll core and for a second standard diameter rewind roll core, the combination comprising a main frame, a first group of a preselected number of spindle assemblies mounted on said main frame, said spindle assemblies being spaced one from the next adjacent one around a circle corresponding to said first standard diameter rewind roll core, a second group of a preselected number of spindle assemblies mounted on said main frame, said second group of spindle assemblies being spaced one from the next adjacent one around a circle having a diameter corresponding to said second standard diameter rewind roll core, each of said spindle assemblies including a spindle, bearing means for rotatably mounting said spindle on said main frame in parallel relationship one with respect to the others, chucking means mounted on one end of said spindle, a drill bit mounted in said chucking means, a drive pulley fixedly mounted on the other end of said spindle, a motor, a motor pulley mounted for rotation on said motor, means mounting an endless timing belt on the outer surface of said pulleys to drive all of said spindles in the same direction and at the same rotational speed, a first mandrel, means mounting said mandrel in concentric relationship with respect to said first group of spindle assemblies, said mandrel having an outside diameter substantially equal to the inside diameter of said first standard core, a second mandrel, means mounting said second mandrel in concentric relationship with respect to said second group of spindle assemblies, said second mandrel having an outside diameter substantially equal to the inside diameter of said second standard core.

Claim 3

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 1 wherein said means mounting said endless timing belt comprises a timing belt which passes sequentially from said motor pulley partially around each in succession of said drive pulleys of said first group of spindle assemblies and then partially around a first idler pulley, means mounting said first idler pulley with respect to the last pulley of said first group to maintain the belt in driving engagement with said last pulley, a second idler pulley, means mounting said second idler pulley with respect to the first pulley of said second group to maintain the belt in driving engagement with said first pulley, and thence partially around each in succession of said drive pulleys of said second group of spindle assemblies, and thence around a third idler pulley, means mounting said third idler pulley with respect to the last pulley of said second group to maintain the belt in driving engagement with said last pulley of the second group, and thence back to said motor pulley.

Claim 4

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 1 wherein all of said pulleys are in substantially the same vertical plane.

Claim 5

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 1 wherein said main frame is a vertically disposed platelike member.

Claim 6

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 4 wherein all of said pulleys are on the same side of said platelike member and wherein all of said drill bits are on the opposite side of said main frame with respect to said pulleys.

Claim 7

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores for receiving drive pins for a first standard diameter rewind roll core and for a second standard diameter rewind roll core, the combination comprising a main frame, a first group of a preselected number of spindle assemblies mounted on said main frame, said spindle assemblies being spaced one from the next adjacent one around a circle corresponding to said first standard diameter rewind roll core, a second group of a preselected number of spindle assemblies mounted on said main frame, said second group of spindle assemblies being equally spaced one from the next adjacent one around a circle having a diameter corresponding to said second standard diameter rewind roll core, each of said spindle assemblies including a spindle, bearing means for rotatably mounting said spindle on said main frame in parallel relationship one with respect to the others, chucking means mounted on one end of said spindle, a drill bit mounted in said chucking means, a drive pulley fixedly mounted on the other end of said spindle, a motor, a motor pulley mounted on said motor, means mounting a single endless timing belt on the outer surface of said pulleys to drive all of said spindles in the same direction and at the same rotational speed, a first mandrel, means mounting said mandrel in concentric relationship with respect to said first group of spindle assemblies and having an outside diameter substantially equal to the inside diameter of said first standard core, a second mandrel, means mounting said second mandrel in concentric relationship with respect to said second group of spindle assemblies and having an outside diameter substantially equal to the inside diameter of said second standard core, a guide plate mounted on said mandrels substantially perpendicular to said drill bits, said guide plate having apertures and said drill bits passing partially through said apertures, means for adjusting the position of said guide plate with respect to the tips of said drill bits to determine the depth of penetration of the holes drilled in said core.

Claim 8

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores for receiving drive pins for a first standard diameter rewind roll core and for a second standard diameter rewind roll core, the combination comprising a main frame, a first group of a preselected number of spindle assemblies mounted on said main frame, said spindle assemblies being spaced one from the next adjacent one around a circle corresponding to said first standard diameter rewind roll core, a second group of a preselected number of spindle assemblies mounted on said main frame, said second group of spindle assemblies being equally spaced one from the next adjacent one around a circle having a diameter corresponding to said second standard diameter rewind roll core, each of said spindle assemblies including a spindle, bearing means for rotatably mounting said spindle on said main frame in parallel relationship one with respect to the others, chucking means mounted on one end of said spindle, a drill bit mounted in said chucking means, a drive pulley fixedly mounted on the other end of said spindle, a motor, a motor pulley mounted on said motor, means mounting a single endless timing belt on the outer surface of said pulleys to drive all of said spindles in the same direction and at the same rotational speed, a first mandrel, means mounting said mandrel in concentric relationship with respect to said first group of spindle assemblies and having an outside diameter substantially equal to the inside diameter of said first standard core, a second mandrel, means mounting said second mandrel in concentric relationship with respect to said second group of spindle assemblies and having an outside diameter substantially equal to the inside diameter of said second standard core, a guide plate mounted on said mandrels substantially perpendicular to said drill bits, said guide plate having apertures and said drill bits passing partially through said apertures, means for adjusting the position of said guide plate with respect to the tips of said drill bits to determine the depth of penetration of the holes drilled in said core.

Claim 9

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 6 wherein the center of the circle corresponding to said first group of spindle assemblies and the center of the circle corresponding to said second group of spindle assemblies are in substantial vertical alignment.

Claim 10

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 6 wherein said first group comprises four spindle assemblies and said second group comprises four spindle assemblies.

Claim 11

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores according to claim 8 wherein the centers of the four spindle assemblies of said first group of spindle assemblies form four corners of a square and two sides of the square are horizontally disposed and two sides are vertically disposed, and the centers of the four spindle assemblies of said second group of spindle assemblies form four corners of a square and two sides of the square are horizontally disposed and two sides are vertically disposed.

Claim 12

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores for receiving drive pins for standard 6-inch diameter rewind roll cores and for standard 3-inch diameter rewind roll cores, the combination comprising a base plate, a motor mounted on said base plate, a vertically extending platelike main frame mounted on said base plate adjacent said motor, a first group of four spindle assemblies mounted on said main frame, said spindle assemblies being equally spaced one with respect to the next adjacent one around a 6-inch diameter circle, a second group of four spindle assemblies mounted on said main frame, said second group of spindle assemblies being equally spaced one from the next adjacent one around a 3-inch diameter circle, each of said spindle assemblies including a substantially horizontally disposed spindle, bearing means for rotatably mounting said spindle on said main frame in parallel relationship one with respect to the others, chucking means mounted on one end of said spindle, a drill bit mounted in said chucking means, a drive pulley fixedly mounted on the other end of said spindle, all of said pulleys being in substantially the same vertical plane, and all of said pulleys being located on the same side of said platelike member, all of said drill bits being on the opposite side of said main frame with respect to said pulleys, a motor pulley mounted on said motor, means mounting a single endless timing belt on the outer surfaces of said pulleys to drive all of said pulleys in the same direction and at the same rotational speed, said means mounting said endless timing belt comprising a timing belt which passes sequentially from said motor pulley partially around each in succession of said drive pulleys of said first group of spindle assemblies and then partially around a first idler pulley, means mounting said first idler pulley with respect to the last pulley of said first group to maintain the belt in driving engagement with said last pulley, a second idler pulley, means mounting said second idler pulley with respect to the first pulley of said second group to maintain the belt in driving engagement with said first pulley, and thence partially around each in succession of said drive pulleys of said second group of spindle assemblies, and thence around a third idler pulley, means mounting said third idler pulley with respect to the last pulley of said second group to maintain the belt in driving engagement with said last pulley of the second group, and thence back to said motor pulley; a first horizontally disposed guide shaft, means fixedly mounting said guide shaft on said main frame centrally with respect to said first group of four spindle assemblies, a second horizontally disposed guide shaft, means fixedly mounting said second guide shaft on said main frame centrally with respect to said second group of four spindle assemblies, a first mandrel, means mounting said first mandrel on said first guide shaft in concentric relationship with respect to said first group of spindle assemblies, said first mandrel having an outside diameter substantially equal to the inside diameter of said 6-inch rewind roll core, a second mandrel, means mounting said second mandrel and said second guide shaft in concentric relationship with respect to to said second group of spindle assemblies, said second mandrel having an outside diameter substantially equal to the inside diameter of said standard 3-inch diameter rewind roll core, a guide plate mounted on said mandrels substantially perpendicular to said drill bits, said guide plate having apertures and said drill bits passing partially through said apertures, means for horizontally adjusting the position of said guide plate with respect to the tips of said drill bits to determine the depth of penetration of the holes drilled in said cores.

Claim 13

A nonadjustable multispindle drilling assembly for drilling holes in rewind roll cores for receiving drive pins for standard 6-inch diameter rewind roll cores and for standard 3-inch diameter rewind roll cores, the combination comprising a base plate, a motor mounted on said base plate, a vertically extending platelike main frame mounted on said base plate adjacent said motor, a first group of four spindle assemblies mounted on said main frame, said spindle assemblies being equally spaced one with respect to the next adjacent one around a 6-inch diameter circle, a second group of four spindle assemblies mounted on said main frame, said second group of spindle assemblies being equally spaced one from the next adjacent one around a 3-inch diameter circle, each of said spindle assemblies including a substantially horizontally disposed spindle, bearing means for rotatably mounting said spindle on said main frame in parallel relationship one with respect to the others, chucking means mounted on one end of said spindle, a drill bit mounted in said chucking means, a drive pulley fixedly mounted on the other end of said spindle, all of said pulleys being in substantially the same vertical plane, and all of said pulleys being located on the same side of said platelike member, all of said drill bits being on the opposite side of said main frame with respect to said pulleys, a motor pulley mounted on said motor, means mounting a single endless timing belt on the outer surfaces of said pulleys to drive all of said pulleys in the same direction and at the same rotational speed, said means mounting said endless timing belt comprising a timing belt which passes sequentially from said motor pulley partially around each in succession of said drive pulleys of said first group of spindle assemblies and then partially around a first idler pulley, means mounting said first idler pulley with respect to the last pulley of said first group to maintain the belt in driving engagement with said last pulley, a second idler pulley, means mounting said second idler pulley with respect to the first pulley of said second group to maintain the belt in driving engagement with said first pulley, and thence partially around each in succession of said drive pulleys of said second group of spindle assemblies, and thence around a third idler pulley, means mounting said third idler pulley with respect to the last pulley of said second group to maintain the belt in driving engagement with said last pulley of the second group, and thence back to said motor pulley; a first horizontally disposed guide shaft, means fixedly mounting said guide shaft on said main frame centrally with respect to said first group of four spindle assemblies, a second horizontally disposed guide shaft, means fixedly mounting said second guide shaft on said main frame centrally with respect to said second group of four spindle assemblies, a first mandrel, means mounting said first mandrel on said first guide shaft in concentric relationship with respect to said first group of spindle assemblies, said first mandrel having an outside diameter substantially equal to the inside diameter of said 6-inch rewind roll core, a second mandrel, means mounting said second mandrel and said second guide shaft in concentric relationship with respect to to said second group of spindle assemblies, said second mandrel having an outside diameter substantially equal to the inside diameter of said standard 3-inch diameter rewind roll core, a guide plate mounted on said mandrels substantially perpendicular to said drill bits, said guide plate having apertures and said drill bits passing partially through said apertures, means for horizontally adjusting the position of said guide plate with respect to the tips of said drill bits to determine the depth of penetration of the holes drilled in said cores.