129 passing through bore 127 and carrying washer 130 is threaded into spindle 128 for attachment of holder 122 to frame 20 in accordance with conventional practice the counterbore 132 concentric with bore 127 and sized to rotatably receive spindle 128 is illustrated in fig9 which along with fig7 and 8 illustrate the modifications of the instant invention tape roll holder 122 is modified by the formation of four radial slots 133 extending inwardly from inner end 123 and four openings 134 extending longitudinally inward from outer end 124 each opening 134 which is preferrably near outer surface 125 is aligned with a respective slot 133 two identical retention members 135 are carried by roll holder 122 each retention member 135 cooperates with two slots 133 and two openings 134 each retention member 135 in general similarity to previously described retention member 104 is generally u shaped including contact elements 137 having forward end 138 and rearward ends 139 intermediate ends 137 and 139 each contact element 137 is bent to form outwardly projecting contact portion 140 rearward ends 139 are directed inwardly extending through slots 133 and integrally joined by member 142 each forward end 138 is generally hook shaped having a terminal portion thereof slidably extending into a respective opening 134 being commonly fabricated of.