a holder for slidably supporting said printing element, said {TAIL ~ holder} having a hollow portion located to the rear of {HEAD ~ said printing element}, said hollow portion having rigid inner walls except at a front portion which faces said rear end of said printing element 
a holder for slidably supporting said printing element , said { TAIL ~ holder } having a hollow portion located to the rear of { HEAD ~ said printing element } , said hollow portion having rigid inner walls except at a front portion which faces said rear end of said printing element
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH