In a fourth aspect of {HEAD ~ the present invention}, in addition to the first aspect, the gate is connected to {TAIL ~ a portion} of the groove, i.e., the portion not forming a sealing surface of the seal 
In a fourth aspect of { HEAD ~ the present invention } , in addition to the first aspect , the gate is connected to { TAIL ~ a portion } of the groove , i.e. , the portion not forming a sealing surface of the seal
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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH