Print hammer impact tip

Claim 2

In a printer, a typedrum having a plurality of columns of type characters on the periphery thereof, each column having a portion with type characters thereon and a portion which is blank, with the blank portions of each of the columns being positioned adjacent the type portions of the respective columns contiguous thereto, and a print hammer centrally supported and capable of spanning the space of two of the columns upon engagement with the typedrum and including an impact tip having a curvature for engaging with a portion of one character in one column prior to engaging with another portion of the same character upon impact of the hammer so that the density of an imprint therefrom is substantially uniform across the face of the printed character.

Claim 3

In the printer of claim 1 where said tip curvature extends across the space of a character portion of a column and a blank portion of an adjacent column in a direction along the typedrum.

Claim 4

In the printer of claim 1 wherein said curvature extends across the space of a character portion of a column and a blank portion of an adjacent column and assumes a shape in which normals to the curve converge on a plane along the typedrum.

Claim 5

In a printer having means for providing uniform density of printed characters, a rotary typedrum with columns of characters thereon, each column having a portion with type characters and a portion which is blank, with the blank portions of each of the columns being positioned adjacent the type portions of the respective columns contiguous thereto, and a centrally supported print hammer capable of striking against the surface of the typedrum and spanning the space of two of the columns, the improvement comprising an impact tip on said hammer, said tip having a curvature starting on a plane at one edge thereof, receding to the midpoint of the tip to a plane farther from the surface of the typedrum than the first-mentioned plane, and advancing to said first-mentioned plane at the opposite edge, whereby a portion of the tip adjacent said one edge strikes part of one character prior to the time a portion of the tip adjacent the midpoint strikes another part of the same character.

Claim 6

In a printer having means for providing uniform density of printed characters, a rotary typedrum with columns of characters thereon, each column having a portion with type characters and a portion which is blank, with the blank portions of each of the columns being positioned adjacent the type portions of the respective columns contiguous thereto, and a centrally supported print hammer capable of striking against the surface of the typedrum and spanning the space of two of the columns, the improvement comprising an impact tip on said hammer, said tip having a curvature starting on a plane at one edge thereof, receding to the midpoint of the tip to a plane farther from the surface of the typedrum than the first-mentioned plane, and advancing to said first-mentioned plane at the opposite edge, whereby a portion of the tip adjacent said one edge strikes part of one character prior to the time a portion of the tip adjacent the midpoint strikes another part of the same character.

Claim 7

In the printer of claim 4 wherein said tip curvature is concavely shaped in a direction toward the surface of and along the typedrum.

Claim 8

In the printer of claim 4 wherein said tip curvature uniformly spans the space of a character portion of one column and a blank portion of an adjacent column and assumes a shape in which normals to the curve converge in a direction along the typedrum.

Claim 9

In a high-speed printer having a continuously rotating typedrum carrying a plurality of columns of characters each column having a portion with type characters and a portion which is blank, and print hammers centrally supported and adaptable to be driven towards said typedrum, each hammer being capable of spanning a column of characters and a blank portion of an adjacent column, the improvement comprising a hammer impact tip having an elongateD surface extending in a direction along the drum so as to span a character column and a blank portion, said surface having a curvature uniformly receding from each end thereof and convergently normal to the curvature of the typedrum whereby one portion of a character in one column is struck by said impact tip prior to the striking of another portion of the same character thereby.

Claim 10

In a high-speed printer having a continuously rotating typedrum carrying a plurality of columns of characters each column having a portion with type characters and a portion which is blank, and print hammers centrally supported and adaptable to be driven towards said typedrum, each hammer being capable of spanning a column of characters and a blank portion of an adjacent column, the improvement comprising a hammer impact tip having an elongateD surface extending in a direction along the drum so as to span a character column and a blank portion, said surface having a curvature uniformly receding from each end thereof and convergently normal to the curvature of the typedrum whereby one portion of a character in one column is struck by said impact tip prior to the striking of another portion of the same character thereby.

Claim 11

In a high-speed printer in accordance with claim 7 wherein the curvature of the surface assumes a concave shape.

Claim 12

In a high-speed printer having a rotatable typedrum divided into sectors with characters embossed on the peripheral surface thereof, the characters being arranged in columns with one sector of columnar characters being offset from another sector of columnar characters, said character columns being spaced by blank portions, a plurality of a print hammers adaptable to be driven against the typedrum, each of said hammers being capable of spanning a character column and a blank portion in a respective sector of the typedrum, an impact tip for each print hammer, the tip having a surface extending in one direction to cover a character width and an adjacent blank space and in the other direction to cover a character height, the surface having a curvature starting on a plane at one end of the tip and extending in the first-mentioned direction, receding from the plane to a maximum midway between the ends of the tip surface to a plane farther from the typedrum surface than the first-mentioned plane, and advancing to said first-mentioned plane at the other end of the tip whereby an outer portion of the impact tip surface strikes one edge of a character prior to an inner portion of the tip striking another edge of the character.

Claim 13

In a high-speed printer having a rotatable typedrum divided into sectors with characters embossed on the peripheral surface thereof, the characters being arranged in columns with one sector of columnar characters being offset from another sector of columnar characters, said character columns being spaced by blank portions, a plurality of a print hammers adaptable to be driven against the typedrum, each of said hammers being capable of spanning a character column and a blank portion in a respective sector of the typedrum, an impact tip for each print hammer, the tip having a surface extending in one direction to cover a character width and an adjacent blank space and in the other direction to cover a character height, the surface having a curvature starting on a plane at one end of the tip and extending in the first-mentioned direction, receding from the plane to a maximum midway between the ends of the tip surface to a plane farther from the typedrum surface than the first-mentioned plane, and advancing to said first-mentioned plane at the other end of the tip whereby an outer portion of the impact tip surface strikes one edge of a character prior to an inner portion of the tip striking another edge of the character.

Claim 14

In a high-speed printer in accordance with claim 9 wherein the tip surface assumes a concave shape in the first mentioned direction and normal to the curvature of the typedrum.

Claim 15

In a high-speed printer having a rotary typedrum divided into sectors, characters arranged in sector columns on the face of the drum, one sector of columnar characters being offset from another sector, and each column of characters being separated from its adjacent column by a blank portion therebetween, and a print hammer centrally supported and adaptable to be driven into contact with said drum and formed to span a column of characters and a blank portion, the combination including an impact tip on said hammer extending across the face thereof laterally along the typedrum and having a surface curvature starting on a plane at one edge of the tip, uniformly receding in a direction toward the hammer support to a midpoint of the tip to a plane farther from the face of the drum than the first-mentioned plane, and uniformly advancing to said first-mentioned plane at the opposite edge of the tip whereby one side of the tip face makes contact with a character at the time the other side spans a blank space and, by reason of the curvature of the tip face, one portion of a character is struck prior to the striking of another portion of the same character.

Claim 16

In a high-speed printer having a rotary typedrum divided into sectors, characters arranged in sector columns on the face of the drum, one sector of columnar characters being offset from another sector, and each column of characters being separated from its adjacent column by a blank portion therebetween, and a print hammer centrally supported and adaptable to be driven into contact with said drum and formed to span a column of characters and a blank portion, the combination including an impact tip on said hammer extending across the face thereof laterally along the typedrum and having a surface curvature starting on a plane at one edge of the tip, uniformly receding in a direction toward the hammer support to a midpoint of the tip to a plane farther from the face of the drum than the first-mentioned plane, and uniformly advancing to said first-mentioned plane at the opposite edge of the tip whereby one side of the tip face makes contact with a character at the time the other side spans a blank space and, by reason of the curvature of the tip face, one portion of a character is struck prior to the striking of another portion of the same character.

Claim 17

In the printer of claim 11 wherein the surface curvature of the impact tip assumes a concave shape in relation to the hammer support and in which normals to the curve converge in a direction along the typedrum.