The apparatus 3 wherein said detector includes a plurality of switches, each corresponding to a particular size of said transfer medium, which are selectively operated by an associated actuating means provided on a magazine for storing therein a quantity of {HEAD ~ transfer medium} of {TAIL ~ a predetermined size} 
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The apparatus 3 wherein said detector includes a plurality of switches , each corresponding to a particular size of said transfer medium , which are selectively operated by an associated actuating means provided on a magazine for storing therein a quantity of { HEAD ~ transfer medium } of { TAIL ~ a predetermined size }
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