Mounting means for single element type carrier

Claim 2

A print head comprising: a single element type carrier including type characters on its periphery and a central bore, a support arbor configured for slidable insertion into said bore, means for axially and rotatively locating the inserted support arbor relative to said type carrier, said support arbor having a predetermined length so that when said arbor means is axially and rotatively located within said bore, a portion of said arbor will project outwardly above said type carrier defining an exposed end portion, and fastener means dimensioned so that in a first axially aligned position relative to said central bore said fastener means can be freely passed there through, said exposed end portion including, means for pivotally securing said fastener means thereto, means for maintaining the secured fastener means in said first position, whereby said fastener means will be freely passed through said central bore as said arbor is inserted thereinto, and cam means for biasing said fastener means downwardly into engagement with the top surface of said type carrier after said fastener means has been displaced to a second position transverse the axis of said support arbor, whereat said type carrier is held between said fastener means and said means for axially locating said type carrier.

Claim 3

A print head comprising: a single element type carrier including type characters on its periphery and a central sleeve defining a bore, said sleeve extending above the top surface of said type carrier and terminating in a grip ring having a surface parallel to and spaced from the top surface of said type carrier, said grip ring having a diameter less than the diameter of the top surface of said type carrier and greater than the diameter of said sleeve, and the space between said grip ring and the top surface of said type carrier being selected so that said grip ring can be gripped without the operator''s fingers touching said type carrier periphery, a support arbor configured for slidable insertion into said bore, means for axially and rotatively locating the inserted support arbor relative to said type carrier, said support arbor having a predetermined length so that when said support arbor is axially and rotatively located within said bore, a portion of said support arbor will project outwardly above the surface of said grip ring defining an exposed end portion, and fastener means pivoted to said exposed end portion and dimensioned so that when placed in a first axially aligned position relative to said support arbor said fastener means can be freely passed through said bore as said support arbor is inserted into said bore, said exposed end portion including, means for securing said fastener means thereto, means for maintaining the secured fastener means in said first position, and means for biasing said fastener means downwardly into engagement with the stop surface of said grip ring towards said type carrier after said fastener means has been displaced to a second position transverse the axes of said support arbor, whereat said type carrier is held between said fastener means and said means for axially locating said type carrier.

Claim 4

A print head comprising: a single element type carrier including type characters on its periphery and a central sleeve defining a bore, said sleeve extending above the top surface of said type carrier and terminating in a grip ring having a surface parallel to and spaced from the top surface of said type carrier, said grip ring having a diameter less than the diameter of the top surface of said type carrier and greater than the diameter of said sleeve, and the space between said grip ring and the top surface of said type carrier being selected so that said grip ring can be gripped without the operator''s fingers touching said type carrier periphery, a support arbor configured for slidable insertion into said bore, means for axially and rotatively locating the inserted support arbor relative to said type carrier, said support arbor having a predetermined length so that when said support arbor is axially and rotatively located within said bore, a portion of said support arbor will project outwardly above the surface of said grip ring defining an exposed end portion, and fastener means pivoted to said exposed end portion and dimensioned so that when placed in a first axially aligned position relative to said support arbor said fastener means can be freely passed through said bore as said support arbor is inserted into said bore, said exposed end portion including, means for securing said fastener means thereto, means for maintaining the secured fastener means in said first position, and means for biasing said fastener means downwardly into engagement with the stop surface of said grip ring towards said type carrier after said fastener means has been displaced to a second position transverse the axes of said support arbor, whereat said type carrier is held between said fastener means and said means for axially locating said type carrier.

Claim 5

A print head according to claim 2 wherein said biasing means comprises selectively inclined grooves cut into said exposed end portion.

Claim 6

A print head according to claim 2 wherein said exposed end portion includes opposing transverse bores, said fastener means comprises a spring clip including spaced parallel legs having end portions extending towards each other for insertion into said transverse bores, and said exposed end portion has at each of two opposed peripheral locations at least one cam tooth configured so that in the course of movement of said fastener means from said first position to said second position said spring clip will be flexed when the legs thereof glide over the crests of said cam teeth And in said second position bear against and be biased downwardly by said cam teeth against the top surface of said grip ring.