US3631797A — Hammer for high-speed printer

Claim 1

Independent Claim 290 words

A print hammer for a high-speed printing mechanism comprising the combination of: a print hammer having a thermoplastic resin body portion, the body portion having along one axis thereof a slender shape with length greater than the width and height of said body portion; cantilever flexure spring support means, including a pair of flexure springs attached respectively to said body portion near its lengthwise ends and flexible in the direction of length of said body portion, for supporting and guiding movement of said thermoplastic resin body portion; a first face member metallic insert covering the impact end of said body portion for said print hammer, said first face member metallic insert including means extending into said thermoplastic resin body portion for attaching said first face member metallic insert to said thermoplastic resin body portion; a second face member nonmetallic insert having a softer composition than said first face member metallic insert and covering the end opposite said first face member metallic insert of said body portion of said print hammer, said second face member nonmetallic insert including means extending into said thermoplastic resin body portion for attaching said second face member nonmetallic insert to said thermoplastic resin body portion; tension spring means having one end thereof permanently attached within said body portion at its end where said second face member nonmetallic insert is attached for urging said print hammer in one direction along said body portion axis of slender shape; and an actuator for said print hammer in contact therewith at the second face member nonmetallic insert end, said tension spring means having its other end in abuTting cooperating relationship with said actuator for urging said actuator into contact with said second face member nonmetallic insert end of said hammer.

Claim 2

Dependent Claim 290 words

A print hammer for a high-speed printing mechanism comprising the combination of: a print hammer having a thermoplastic resin body portion, the body portion having along one axis thereof a slender shape with length greater than the width and height of said body portion; cantilever flexure spring support means, including a pair of flexure springs attached respectively to said body portion near its lengthwise ends and flexible in the direction of length of said body portion, for supporting and guiding movement of said thermoplastic resin body portion; a first face member metallic insert covering the impact end of said body portion for said print hammer, said first face member metallic insert including means extending into said thermoplastic resin body portion for attaching said first face member metallic insert to said thermoplastic resin body portion; a second face member nonmetallic insert having a softer composition than said first face member metallic insert and covering the end opposite said first face member metallic insert of said body portion of said print hammer, said second face member nonmetallic insert including means extending into said thermoplastic resin body portion for attaching said second face member nonmetallic insert to said thermoplastic resin body portion; tension spring means having one end thereof permanently attached within said body portion at its end where said second face member nonmetallic insert is attached for urging said print hammer in one direction along said body portion axis of slender shape; and an actuator for said print hammer in contact therewith at the second face member nonmetallic insert end, said tension spring means having its other end in abuTting cooperating relationship with said actuator for urging said actuator into contact with said second face member nonmetallic insert end of said hammer.

Claim 3

Dependent Claim 18 words

A print hammer as in claim 1 wherein said second face member nonmetallic insert is composed of plastic.

Claim 4

Dependent Claim 42 words

A print hammer as in claim 1 wherein said first face member metallic insert is composed of powdered metal and said second face member nonmetallic insert is composed of a thermoplastic acetal resin containing particles of fluorinated ethylene-propylene resin as a filler.

Claim 5

Dependent Claim 33 words

A print hammer as in claim 3 wherein said second face member nonmetallic insert is composed of thermoplastic acetal resin containing fluorinated ethylene-propylene resin particles in a proportion near 14 percent by weight.

Claim 6

Dependent Claim 25 words

A print hammer as in claim 1 wherein said thermoplastic resin body portion for said print hammer comprises nylon containing randomly distributed particles of fiberglass.

Claim 7

Dependent Claim 38 words

A print hammer as in claim 1 wherein said tension spring means includes a wire spring shaped substantially in the configuration of a rounded capital letter P with its stem portion being permanently attached within said body portion.

Claim 8

Dependent Claim 30 words

A print hammer as in claim 6 wherein said tension spring means wire spring is attached within said second face member insert means extending into said thermoplastic resin body portion.

Claim 9

Dependent Claim 40 words

A print hammer as in claim 1 wherein said thermoplastic body portion includes print hammer penetration stop face member means integral with said body portion and extending away form said body portion for engaging a print hammer penetration stop member.

Claim 10

Dependent Claim 249 words

Organic material print hammer slug apparatus of the ballistic type for a high speed printing mechanism which also includes a continuously moving typefont and a movable print hammer driving member, said print hammer slug apparatus comprising the combination of: a print hammer slug body member, said body member having a composition that includes nylon filled with short randomly oriented particles of fiberglass and having a shape that incorporates body length substantially greater than body height and width; supporting and guiding means including a pair of steel cantilever flexure springs, attached at one end thereof within said body member, for supporting said body member lengthwise perpendicularly adjacent to said continuously moving typefont; metal face member insert means for covering the end of said body member adjacent said continuously moving typefont, said face member insert means including attachment means extending into said body member, said face member insert means being composed of powdered metal; plastic face member insert means for covering the end of said body member opposite said continuously moving typefont, said plastic face member insert means including attachment means extending into said body member and an external planar face that is substantially perpendicular to the length of said body member for engaging said movable print hammer driving member; and tension spring means fixedly connected to said body member and in loose abutting relation to said print hammer driving member for resiliently holding said members in touching engagement at said plastic face member planar face during an operating cycle portion.

Claim 11

Dependent Claim 249 words

Organic material print hammer slug apparatus of the ballistic type for a high speed printing mechanism which also includes a continuously moving typefont and a movable print hammer driving member, said print hammer slug apparatus comprising the combination of: a print hammer slug body member, said body member having a composition that includes nylon filled with short randomly oriented particles of fiberglass and having a shape that incorporates body length substantially greater than body height and width; supporting and guiding means including a pair of steel cantilever flexure springs, attached at one end thereof within said body member, for supporting said body member lengthwise perpendicularly adjacent to said continuously moving typefont; metal face member insert means for covering the end of said body member adjacent said continuously moving typefont, said face member insert means including attachment means extending into said body member, said face member insert means being composed of powdered metal; plastic face member insert means for covering the end of said body member opposite said continuously moving typefont, said plastic face member insert means including attachment means extending into said body member and an external planar face that is substantially perpendicular to the length of said body member for engaging said movable print hammer driving member; and tension spring means fixedly connected to said body member and in loose abutting relation to said print hammer driving member for resiliently holding said members in touching engagement at said plastic face member planar face during an operating cycle portion.

Claim 12

Dependent Claim 53 words

Organic material print hammer slug apparatus as in claim 9 wherein said tension spring means includes a single-strand wire spring having a curving portion at one end thereof and having the other end thereof permanently attached within said body member at the body member end where said plastic face member insert is located.

Claim 13

Dependent Claim 38 words

Organic material print hammer slug apparatus as in claim 9 wherein said plastic face member insert includes a face member insert having a composition that includes thermoplastic acetal resin material having fluorinated ethylene-propylene resin material particles dispersed therein.

Claim 14

Dependent Claim 27 words

Organic material print hammer slug apparatus as in claim 9 wherein said body member nylon material contains fiberglass particles in a concentration near 40 percent by weight.

Claim 15

Dependent Claim 285 words

In combination with a print hammer slug member, a hammer return spring for inducing and maintaining frictional engagement between a print hammer slug member driving member and said print hammer slug member in a high-speed ballistic printer mechanism, said hammer return spring being composed of: a unitary strand spring steel wire body for said hammer return spring; curving end portion means imposed upon one end of said spring steel wire body for anchoring said return spring within said print hammer slug member; a substantially closed circular curve portion imposed upon the remaining end of said spring steel wire body, the substantially closed circular curve being coplanar with said curving end portion means and having a radius of curvature at least five times the radius of the spring steel wire composing said spring steel wire body; and a substantially straight shank portion located on said spring steel wire body between said curving end portion means and said substantially closed circular curve portion, said shank portion being substantially coplanar with both said curving end portion and said substantially closed circular curve, said shank portion having a length that is between one-half and six times the radius of curvature of said substantially closed circular curve portion; whereby said hammer return spring, when said curving end portion means is anchored within an end of said print hammer slug member, has the appearance of a rounded capital letter P standing upon the end of said print hammer slug member; and whereby said print hammer slug driving member may be frictionally engaged between said substantially closed circular curve portion of said hammer return spring and an end of said print hammer slug member by resilient force from said hammer return spring.

Claim 16

Dependent Claim 285 words

In combination with a print hammer slug member, a hammer return spring for inducing and maintaining frictional engagement between a print hammer slug member driving member and said print hammer slug member in a high-speed ballistic printer mechanism, said hammer return spring being composed of: a unitary strand spring steel wire body for said hammer return spring; curving end portion means imposed upon one end of said spring steel wire body for anchoring said return spring within said print hammer slug member; a substantially closed circular curve portion imposed upon the remaining end of said spring steel wire body, the substantially closed circular curve being coplanar with said curving end portion means and having a radius of curvature at least five times the radius of the spring steel wire composing said spring steel wire body; and a substantially straight shank portion located on said spring steel wire body between said curving end portion means and said substantially closed circular curve portion, said shank portion being substantially coplanar with both said curving end portion and said substantially closed circular curve, said shank portion having a length that is between one-half and six times the radius of curvature of said substantially closed circular curve portion; whereby said hammer return spring, when said curving end portion means is anchored within an end of said print hammer slug member, has the appearance of a rounded capital letter P standing upon the end of said print hammer slug member; and whereby said print hammer slug driving member may be frictionally engaged between said substantially closed circular curve portion of said hammer return spring and an end of said print hammer slug member by resilient force from said hammer return spring.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-01-03	1975-07-05	1976-01-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-01-03	1979-07-05	1980-01-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-01-03	1983-07-05	1984-01-04	$7700.00	Window Closed / Lapsed

Hammer for high-speed printer

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