Final positioning mechanism for single element type carrier

Claim 2

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being movable to position a selected type character for printing, moving means for moving said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means, said support member being movably supported for moving said type head in a printing movement from a normal position to a printing position to impact the selected type character against a recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for defining the correct impacting position of the selected type character on said type head, detenting means for engagement with said detent formations to correctly position the selected type character prior to impacting against a recording medium, acting means acting on said detenting means independently of said drive means and in response to the printing movement of said support member to move said type head to the printing position for moving said detenting means into engagement with said detent formation to correctly position the selected type character for impacting against a recording medium at the printing poisition, and disengaging means separate from said support member and stationary relative to the printing movement of said support member for acting on said detenting means independently of said drive means and in response to the movement of said support member to move said type head to the normal position for removing said detenting means from engagement with said detent formations.

Claim 3

In a printing machine according to claim 1, said acting means being in the form of a spring urging said detenting means into engagement with said detent formations.

Claim 4

In a printing machine according to claim 1, said disengaging means being in the form of a stationary member being engaged by said detenting means in response to the movement of said support member to move said type head to the normal position.

Claim 5

In a printing machine according to claim 1: said type head being rotatable and tiltable for rotationally and elevationally positioning a selected type character for printing, said detent formations associated with said type head serving to correctly define both the rotational and elevational position of a particular type character for impact, and said detenting means being cooperable with said detent formations associated with said type head for correctly positioning said type head both rotationally and elevationally to impact a particular type character against a recording medium.

Claim 6

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being movable to position a selected type character for printing, moving means for moving said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means, said support member being movably supported for moving said type head in a printing movement from a normal position to a printing position to impact the selected type character against a recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for defining the correct impacting position of the seLected type character on said type head, detenting means for engagement with said detent formations to correctly position the selected type character prior to impacting against a recording medium, said detenting means being carried by said support member for movement therewith, and acting means acting on said detenting means independently of said drive means and in response to the printing movement of said support member to move said type head to the printing position for moving said detenting means into engagement with said detent formation to correctly position the selected type character for impacting against a recording medium at the printing position.

Claim 7

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being movable to position a selected type character for printing, moving means for moving said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means, said support member being movably supported for moving said type head in a printing movement from a normal position to a printing position to impact the selected type character against a recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for defining the correct impacting position of the seLected type character on said type head, detenting means for engagement with said detent formations to correctly position the selected type character prior to impacting against a recording medium, said detenting means being carried by said support member for movement therewith, and acting means acting on said detenting means independently of said drive means and in response to the printing movement of said support member to move said type head to the printing position for moving said detenting means into engagement with said detent formation to correctly position the selected type character for impacting against a recording medium at the printing position.

Claim 8

In a printing machine according to claim 5, said acting means being in the form of a spring carried by said support member and urging said detenting means into engagement with said detent formations associated with said type head.

Claim 9

In a printing machine according to claim 6, the combination further comprising a stationary member separate from said support member and stationary relative to the printing movement of said support member and acting on said detenting means independently of said drive means and in response to the movement of said support member to move said type head to the normal position for removing said detenting means from engagement with said detent formations.

Claim 10

In a printing machine according to claim 5: said support member being pivotally supported for pivotally moving said type head between a normal position and a printing position, said detenting means being pivotally supported on said support member for pivotal movement into engagement with said detent formations, and said acting means being in the form of a spring carried by said support member for pivotally urging said detenting means into engagement with said detent formations.

Claim 11

In a printing machine according to claim 8, the combination further comprising disengaging means acting on said detenting means independently of said drive means and in response to the movement of said support member to move said type head to the normal position for removing said detenting means from engagement with said detent formations.

Claim 12

In a printing machine according to claim 9, said disengaging means being in the form of a member stationary relative to said support member and engaged by said detenting means in response to the movement of said support member to move said type head to the normal position.

Claim 13

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being movable to position a selected type character for printing, moving means for moving said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means, said support member being movably supported for moving said type head in a printing movement from a normal position to a printing position to impact the selected type character against a recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for defining the correct impacting position of the selected type character on said type head, detenting means for engagement with said detent formations to correctly position the selected type character prior to impacting against a recording medium, said type head having a cavity formed therein which opens towards the exterior surface, one of said detent formations being located in said cavity for defining the correct rotational impacting position of the selected type character, said detenting means including an arm extending into said cavity formed in said type head for engaging the detent formation located thereiN, and acting means acting on said detenting means independently of said drive means and in response to the printing movement of said support member to move said type head to the printing position for moving said detenting means into engagement with said detent formation to correctly position the selected type character for impacting against a recording medium at the printing position.

Claim 14

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being movable to position a selected type character for printing, moving means for moving said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means, said support member being movably supported for moving said type head in a printing movement from a normal position to a printing position to impact the selected type character against a recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for defining the correct impacting position of the selected type character on said type head, detenting means for engagement with said detent formations to correctly position the selected type character prior to impacting against a recording medium, said type head having a cavity formed therein which opens towards the exterior surface, one of said detent formations being located in said cavity for defining the correct rotational impacting position of the selected type character, said detenting means including an arm extending into said cavity formed in said type head for engaging the detent formation located thereiN, and acting means acting on said detenting means independently of said drive means and in response to the printing movement of said support member to move said type head to the printing position for moving said detenting means into engagement with said detent formation to correctly position the selected type character for impacting against a recording medium at the printing position.

Claim 15

In a printing machine according to claim 11: said type head being tiltable about an axis in said cavity formed in said type head for elevationally positioning a selected type character for printing, said rotational detent formation for correctly rotationally positioning the selected type character on said type head being in the form of teeth spaced circumferentially about said cavity, said teeth having a configuration extending substantially parallel to the axis of rotation of said type head, and said arm of said detenting means extending into said cavity of said type head having a tooth formed thereon for engaging said circumferentially spaced teeth at a location substantially aligned with the tilt axis and the type character selected for printing.

Claim 16

In a printing machine according to claim 11: said type head being tiltable about an axis in said cavity formed in said type head for elevationally positioning the selected type character for printing, said rotational detent formation for correctly rotationally positioning the selected type character on said type head being in the form of teeth spaced circumferentially about said cavity, said teeth having a configuration extending substantially parallel to the axis of rotation of said type head, said arm of said detenting means extending into said cavity of said type head having a tooth formed thereon for engaging said circumferentially spaced teeth at a location substantially aligned with the tilt axis and the type character selected for printing, and said tooth formed on said arm of said detenting means having an arcuately curved configuration conforming substantially with the radius of movement of said type head about the tilt axis at the location of engagement with said circumferentially spaced teeth.

Claim 17

In a printing machine according to claim 11: said type head being tiltable about an axis in said cavity formed in said type head for elevationally positioning a selected type character for printing, said rotational detent formation for correctly rotationally positioning a selected type character on said type head being in the form of teeth spaced circumferentially about said cavity, said teeth having a configuration extending substantially parallel to the axis of rotation of said type head, said arm of said detenting means extending into said cavity of said type head having a tooth formed thereon for engaging said circumferentially spaced teeth at a location substantially aligned with the tilt axis and the type character selected for printing, and said circumferentially spaced teeth having a curvature substantially conforming to the radius of movement of said type head about the tilt axis at the location of engagement with said tooth of said detenting means.

Claim 18

In a printing machine according to claim 11: another of said detent formations associated with said type head being tiltable therewith for defining the correct elevational impacting position of the selected type character, and said detenting means further including another arm for engaging said other detent formation defining the elevational positions of said type head.

Claim 19

In a printing machine according to claim 11: said cavity formed in said type head opening externally toward said support member, said type head being tiltable about an axis in said cavity for elevationally positioning a selected type character for printing, said rotational detent formation for correctly rotationally positioning the selected type character on said type head being in the form of teeth spaCed circumferentially about said cavity, said arm of said detenting means extending into said cavity of said type head and having a tooth formed thereon for engaging said circumferentially spaced teeth at a location substantially aligned with the tilt axis and the type character selected for printing, and said arm of said detenting means being pivotally supported on said support member at a location substantially perpendicular to the alignment of the tilt axis and the location of engagement of said tooth with said circumferentially spaced teeth.

Claim 20

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being rotatable and tiltable for rotationally and elevationally positioning a selected type character for printing, moving means for rotating and tilting said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means and being pivotally movable in a printing movement between a normal position and a printing position to impact the selected type character against the recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for correctly defining the rotational and elevational position of the selected type character on said type head, detenting means associated with said support member for engagement with said detent formations of said type head for correctly positioning said type head both rotationally and elevationally to impact the selected type character against the recording medium, said detenting means being in the form of levers pivotally supported on said support member for movement into engagement with said detent formations associated with said type head, resilient biasing means for urging said detenting levers into engagement with said detent formations, stationary means for engaging said resiliently biased levers upon movement of said type head to the normal position for preventing said detenting levers from engaging said detent formations associated with said type head, and said detenting levers being operable independently of said drive means and movable under the urging of said resilient biasing means in response to the printing movement of said type head to the printing position for engaging said detenting formations associated with said type head to correctly position the selected type character for printing.

Claim 21

In a printing machine, the combination comprising: a type head having type characters formed thereon for impacting against a recording medium, said type head being rotatable and tiltable for rotationally and elevationally positioning a selected type character for printing, moving means for rotating and tilting said type head to effect approximate positioning of the type character selected for printing, a support member for supporting said type head and said moving means and being pivotally movable in a printing movement between a normal position and a printing position to impact the selected type character against the recording medium, drive means for driving said movable support member to effect the printing movement of said type head to impact a selected type character against a recording medium at a printing position, detent formations associated with said type head for correctly defining the rotational and elevational position of the selected type character on said type head, detenting means associated with said support member for engagement with said detent formations of said type head for correctly positioning said type head both rotationally and elevationally to impact the selected type character against the recording medium, said detenting means being in the form of levers pivotally supported on said support member for movement into engagement with said detent formations associated with said type head, resilient biasing means for urging said detenting levers into engagement with said detent formations, stationary means for engaging said resiliently biased levers upon movement of said type head to the normal position for preventing said detenting levers from engaging said detent formations associated with said type head, and said detenting levers being operable independently of said drive means and movable under the urging of said resilient biasing means in response to the printing movement of said type head to the printing position for engaging said detenting formations associated with said type head to correctly position the selected type character for printing.