Method of manufacturing type fingers

Claim 1

The method of producing type fingers comprising: forming a character bar having a plurality of characters disposed along the length thereof, providing a coupon blank, welding said character bar to said coupon blank, subsequently brazing said character bar to said coupon blank, and punching out a plurality of type fingers each including a single character and a portion of said coupon blank.

Claim 2

The method of producing type fingers comprising: forming a character bar having a plurality of characters disposed along the length thereof, providing a coupon blank, welding said character bar to said coupon blank, subsequently brazing said character bar to said coupon blank, and punching out a plurality of type fingers each including a single character and a portion of said coupon blank.

Claim 10

The method of producing type fingers comprising: forming a character bar having a plurality of characters spaced along the length thereof with location projections at the ends thereof and a relatively short length, forming a coupon blank having a length substantially equal to the length of said bar and having a plurality of slots extending lengthwise thereof, forming a first series of apertures along one end of the length dimension and a corresponding series of apertures along the other end of the length dimension, said apertures being positioned on the center lines between each pair of adjacent slots and having the same spacing as said characters on said bar, utilizing said projections and end apertures of said first and second series of apertures for accurately positioning said bar on said blank for a welding operation such that said characters lie on the center lines between opposing apertures of said first and second series of apertures spot welding said character bar to said blank in the space between each of said characters, to provide a composite assembly, brazing said bar to said blank at the faying surfaces of said bar and coupon, utilizing each of said first and secOnd series of apertures for accurately positioning said composite assembly for a punching operation, punching out a plurality of type fingers in succession each including a single character and a portion of the coupon blank between opposing apertures of said first and second series of apertures and adjacent slots.

Claim 11

The method of producing type fingers comprising: forming a character bar having a plurality of characters spaced along the length thereof with location projections at the ends thereof and a relatively short length, forming a coupon blank having a length substantially equal to the length of said bar and having a plurality of slots extending lengthwise thereof, forming a first series of apertures along one end of the length dimension and a corresponding series of apertures along the other end of the length dimension, said apertures being positioned on the center lines between each pair of adjacent slots and having the same spacing as said characters on said bar, utilizing said projections and end apertures of said first and second series of apertures for accurately positioning said bar on said blank for a welding operation such that said characters lie on the center lines between opposing apertures of said first and second series of apertures spot welding said character bar to said blank in the space between each of said characters, to provide a composite assembly, brazing said bar to said blank at the faying surfaces of said bar and coupon, utilizing each of said first and secOnd series of apertures for accurately positioning said composite assembly for a punching operation, punching out a plurality of type fingers in succession each including a single character and a portion of the coupon blank between opposing apertures of said first and second series of apertures and adjacent slots.

Claim 12

The method of producing type fingers comprising: forming a character bar having a plurality of type characters spaced along the length thereof from an impact resistant material, forming a coupon blank from a sheet alloy material having good resilience characteristics and a length substantially equal to the length of said bar, spot welding said character bar to said blank in the space between each of said characters at locations sufficiently far from the characters to permit the discard of the welded portion when the fingers are punched out in a subsequent operation, brazing said bar to said blank at the faying surfaces of said bar and coupon with a brazing alloy at the melting temperature of said alloy in a nonoxidizing atmosphere, punching out a plurality of type fingers each including a single character of said bar and a portion of the coupon blank brazed thereto, and subsequently hardening the punched out type fingers by heat treating them in a nonoxidizing atmosphere for a sufficient period of time at a temperature below the temperature of brazing, followed by rapid cooling in such atmosphere to provide the punched out type fingers with desirable spring properties.

Claim 13

The method of producing type fingers comprising: forming a character bar having a plurality of type characters spaced along the length thereof from an impact resistant material, forming a coupon blank from a sheet alloy material having good resilience characteristics and a length substantially equal to the length of said bar, spot welding said character bar to said blank in the space between each of said characters at locations sufficiently far from the characters to permit the discard of the welded portion when the fingers are punched out in a subsequent operation, brazing said bar to said blank at the faying surfaces of said bar and coupon with a brazing alloy at the melting temperature of said alloy in a nonoxidizing atmosphere, punching out a plurality of type fingers each including a single character of said bar and a portion of the coupon blank brazed thereto, and subsequently hardening the punched out type fingers by heat treating them in a nonoxidizing atmosphere for a sufficient period of time at a temperature below the temperature of brazing, followed by rapid cooling in such atmosphere to provide the punched out type fingers with desirable spring properties.

Claim 15

The method of producing type fingers comprising: forming a character bar having a plurality of characters spaced along the length thereof from a hard, impact resistant steel with location projections at the ends thereof, forming a coupon blank from maraging steel having a length substantially equal to the length of said bar and having a plurality of slots extending transversely of the length thereof, forming a first series of apertures along one end of the length dimension of said blank and a corresponding series of apertures along the other end of the length dimension of said blank, said apertures being positioned on the center lines between each pair of adjacent slots and having the same spacing as said characters on said bar, utilizing said projections and end apertures of said first and second series of apertures for accurately positioning said bar on said blank for a welding operation such that said characters lie on the center lines between opposing apertures of said first and second series of apertures, spot welding said character bar to said blank in the space between each of said characters at locations sufficiently far from the characters to insure the discard of the welded portion when the fingers are subsequently punched out, brazing said bar to said blank at the faying surfaces of said bar and coupon with a brazing alloy at the melting temperature of said alloy, utilizing each of said first and second series of apertures for accurately positioning said composite assembly for a punching operation, punching out a plurality of type fingers each including a single character of said bar and a portion of the coupon blank between opposing apertures of said first and second series of apertures and between adjacent slots, and subsequently hardening the punched out type fingers by heat treating them in a nonoxidizing atmosphere for a sufficient period of time at a temperature below the temperature of brazing, and then rapidly cooling in such atmosphere to provide the punched out fingers with desirable spring properties.

Claim 16

The method of producing type fingers comprising: forming a character bar having a plurality of characters spaced along the length thereof from a hard, impact resistant steel with location projections at the ends thereof, forming a coupon blank from maraging steel having a length substantially equal to the length of said bar and having a plurality of slots extending transversely of the length thereof, forming a first series of apertures along one end of the length dimension of said blank and a corresponding series of apertures along the other end of the length dimension of said blank, said apertures being positioned on the center lines between each pair of adjacent slots and having the same spacing as said characters on said bar, utilizing said projections and end apertures of said first and second series of apertures for accurately positioning said bar on said blank for a welding operation such that said characters lie on the center lines between opposing apertures of said first and second series of apertures, spot welding said character bar to said blank in the space between each of said characters at locations sufficiently far from the characters to insure the discard of the welded portion when the fingers are subsequently punched out, brazing said bar to said blank at the faying surfaces of said bar and coupon with a brazing alloy at the melting temperature of said alloy, utilizing each of said first and second series of apertures for accurately positioning said composite assembly for a punching operation, punching out a plurality of type fingers each including a single character of said bar and a portion of the coupon blank between opposing apertures of said first and second series of apertures and between adjacent slots, and subsequently hardening the punched out type fingers by heat treating them in a nonoxidizing atmosphere for a sufficient period of time at a temperature below the temperature of brazing, and then rapidly cooling in such atmosphere to provide the punched out fingers with desirable spring properties.

Claim 17

The method of producing type fingers comprising: forming a character bar having a plurality of characters raised above the surface of the bar and being equally spaced along the length thereof from hard, impact resistant material, said bar including projections used to precisely locate the bar in a fixture, forming a coupon blank from a super-strength alloy with relatively good Hardness, slight corrosion resistance, favorable fatigue limits and good spring properties, said blank having a length substantially equal to the length of said bar and having a plurality of slots extending transversely of the length thereof, placing the bar with the type faces facing down on the fixture and the projections inserted into locating holes in the fixture, placing the coupon atop of the located bar with the two outermost apertures of the coupon inserted over corresponding locating pins in the fixture, punching said coupon blank with a plurality of slots extending parallel to the location of the axis of the fingers to be subsequently punched out and intermediate each of the finger locations, forming a first series of apertures along one end of the length dimension and a corresponding series of apertures along the other end of the length dimension, said apertures being positioned on the center lines between each pair of adjacent slots and having the same spacing as said characters on said bar, spot welding said character bar to said blank in the space between each of said characters at locations sufficiently far from the characters to insure the discard of the welded portion when the fingers are subsequently punched out, brazing said bar to said blank at the faying surfaces of said bar and coupon, utilizing each of said first and second series of apertures for accurately positioning said composite assembly for a punching operation, punching out a plurality of type fingers in succession each including a single character and a portion of the coupon blank between opposing apertures of said first and second series of apertures and between adjacent slots, subsequently hardening the punched out type fingers by heat treating them in nonoxidizing atmosphere, and then rapidly cooling said fingers in such atmosphere to provide the punched out fingers with desirable spring properties.

Claim 18

The method of producing type fingers comprising: forming a character bar having a plurality of characters raised above the surface of the bar and being equally spaced along the length thereof from hard, impact resistant material, said bar including projections used to precisely locate the bar in a fixture, forming a coupon blank from a super-strength alloy with relatively good Hardness, slight corrosion resistance, favorable fatigue limits and good spring properties, said blank having a length substantially equal to the length of said bar and having a plurality of slots extending transversely of the length thereof, placing the bar with the type faces facing down on the fixture and the projections inserted into locating holes in the fixture, placing the coupon atop of the located bar with the two outermost apertures of the coupon inserted over corresponding locating pins in the fixture, punching said coupon blank with a plurality of slots extending parallel to the location of the axis of the fingers to be subsequently punched out and intermediate each of the finger locations, forming a first series of apertures along one end of the length dimension and a corresponding series of apertures along the other end of the length dimension, said apertures being positioned on the center lines between each pair of adjacent slots and having the same spacing as said characters on said bar, spot welding said character bar to said blank in the space between each of said characters at locations sufficiently far from the characters to insure the discard of the welded portion when the fingers are subsequently punched out, brazing said bar to said blank at the faying surfaces of said bar and coupon, utilizing each of said first and second series of apertures for accurately positioning said composite assembly for a punching operation, punching out a plurality of type fingers in succession each including a single character and a portion of the coupon blank between opposing apertures of said first and second series of apertures and between adjacent slots, subsequently hardening the punched out type fingers by heat treating them in nonoxidizing atmosphere, and then rapidly cooling said fingers in such atmosphere to provide the punched out fingers with desirable spring properties.