Multiple belt punch

Claim 2

A multiple belt punch comprising an elongated flat worktable for supporting heavy belting material, said worktable having first and second belt roll support bars journaled in cantilevered bearings extending from each end thereof for supporting takeup and takeoff belt rolls, respectively, in a position away from said worktable, engagement means for causing the belt rolls to rotate with the support bars, drive means for rotating at least said first support bar to pull said supported belting across said worktable and onto a takeup roll carried by said first bar and to selectively advance said supported belting along said table from said second support bar on which the takeofF belt roll is mounted, rotational drag means engaged with said second support bar to prevent overrunning of said takeoff roll as belting is pulled therefrom by the rotation of said first support bar, a belt manual advance adjustment means mounted on said worktable for engaging the belting which passes thereover in travelling from the takeoff roll to the takeup roll to permit incremental movement of the belting either forward or backward along said table between said rolls, a reciprocating punch bar mounted over and supported by said table and having a multiplicity of belt punches removably secured thereto whereby a plurality of holes may be simultaneously punched in said belting, and an adjustable guide means for centering different widths of belting supported on said flat worktable under said punch bar.

Claim 3

The multiple belt punch of claim 1 wherein said drive means includes a variable speed control to permit a variable range of rotational speeds of said first support bar.

Claim 4

The multiple belt punch of claim 1 wherein said rotational drag means is an adjustable torque limiter which is secured to said second support bar and selectively engageable to activate or inactivate said drag means.

Claim 5

The multiple belt punch of claim 1 wherein said guide means includes a pair of parallel guide plates mounted on opposite sides and adjacent the path belting travels across the worktable, said plates engaging opposite ends of at least one threaded shaft having opposite threads on each end thereof whereby rotation of said threaded shaft in a first direction moves said plates either toward or away from each other and reverse rotation of said shaft moves said plates in the opposite direction, said plates being continually equidistant to the perpendicular center line of said punch bar on opposite sides thereof.

Claim 6

The multiple belt punch of claim 4 wherein said guide means further includes a pair of parallel threaded shafts mechanically interconnected for equal angular rotation and disposed transverse to said guide plates, each of said shafts having opposite threads on each end thereof engaging said guide plates, said shafts being rotatable by a single manual handwheel operable by the belt punch operator.

Claim 7

The multiple belt punch of claim 1 wherein said manual advance adjustment means includes a pair of parallel rollers mounted on said worktable and between which the belting passes, said rollers being adjustable toward and away from each other to permit frictional engagement of said belting, and at least one of said rollers having a handwheel secured thereto to permit manual rotation of said rollers to move said belting.

Claim 8

A multiple belt punch comprising a worktable having first and second belt roll support bars journaled at each end thereof for supporting takeup and takeoff belt rolls, respectively, engagement means for causing the belt rolls to rotate with the support bars, a motor means engaged with said first support bar to wind said belting onto said bar into a takeup roll, variable speed control for said motor means to permit a variable range of rotational speeds of said first support bar and to permit selective advancement of said belting along said worktable from said second support bar on which the takeoff belt roll is mounted, an adjustable torque limiter secured to said second support bar to prevent overrunnning of said takeoff roll as belting is pulled therefrom by the rotation of said first support bar, said limiter being selectively engageable with said worktable to activate or inactivate said drag means, a pair of parallel rollers mounted on said worktable and between which the belting passes in travelling from the takeoff roll to the takeup roll, said rollers being adjustable toward and away from each other to permit frictional engagement of said belting, said rollers mechanically interconnected to a manually operable handwheel for rotation of said rollers to permit incremental movement of said beltIng either forward or backward along said table between said rolls, said handwheel operable by the belt punch operator, a hydraulically powered vertically reciprocating punch bar mounted over said worktable in a frame secured to said worktable, said punch bar having a multiplicity of belt punches removably secured thereto, control means for activating the punch bar operable by said belt punch operator, a pair of parallel threaded shafts journaled in said worktable and mechanically interconnected for equal angular rotation, said shafts having opposite threads on each end thereof and being rotatable by a single manually operable handwheel operable by the belt punch operator, a pair of parallel guide plates mounted on opposite sides and adjacent the path the belting travels across the worktable, said plates engaging the threaded shafts whereby as said shafts are rotated in a first direction said plates move either toward or away from each other and reverse rotation of said shafts moves said plates in the opposite direction, said plates being initially disposed equal distances on opposite sides of the perpendicular centerline of said punch bar, and indicator means mounted on said belt punch for accurate measurement of the amount of belt passing under said punch bar.

Claim 9

A multiple belt punch comprising a worktable having first and second belt roll support bars journaled at each end thereof for supporting takeup and takeoff belt rolls, respectively, engagement means for causing the belt rolls to rotate with the support bars, a motor means engaged with said first support bar to wind said belting onto said bar into a takeup roll, variable speed control for said motor means to permit a variable range of rotational speeds of said first support bar and to permit selective advancement of said belting along said worktable from said second support bar on which the takeoff belt roll is mounted, an adjustable torque limiter secured to said second support bar to prevent overrunnning of said takeoff roll as belting is pulled therefrom by the rotation of said first support bar, said limiter being selectively engageable with said worktable to activate or inactivate said drag means, a pair of parallel rollers mounted on said worktable and between which the belting passes in travelling from the takeoff roll to the takeup roll, said rollers being adjustable toward and away from each other to permit frictional engagement of said belting, said rollers mechanically interconnected to a manually operable handwheel for rotation of said rollers to permit incremental movement of said beltIng either forward or backward along said table between said rolls, said handwheel operable by the belt punch operator, a hydraulically powered vertically reciprocating punch bar mounted over said worktable in a frame secured to said worktable, said punch bar having a multiplicity of belt punches removably secured thereto, control means for activating the punch bar operable by said belt punch operator, a pair of parallel threaded shafts journaled in said worktable and mechanically interconnected for equal angular rotation, said shafts having opposite threads on each end thereof and being rotatable by a single manually operable handwheel operable by the belt punch operator, a pair of parallel guide plates mounted on opposite sides and adjacent the path the belting travels across the worktable, said plates engaging the threaded shafts whereby as said shafts are rotated in a first direction said plates move either toward or away from each other and reverse rotation of said shafts moves said plates in the opposite direction, said plates being initially disposed equal distances on opposite sides of the perpendicular centerline of said punch bar, and indicator means mounted on said belt punch for accurate measurement of the amount of belt passing under said punch bar.

Claim 10

The multiple belt punch of claim 1 including a stripper bar secured to said table above said belting, said stripper bar having a plurality of holes formed therein through which said belt punches pass, whereby said punches may be pulled from said belting upon withdrawal of said punch bar after said holes have been punched.