Abstract 1. IN A METHOD FOR FORMING ORIENTED CLOSED END HOLLOW ARTICLES COMPRISING HEATING A THERMOPLASTIC PARISON TO ORIENTATION TEMPERATURE, EXPANDING SAID PARISON OUT AGAINST A MOLD FORMED BY TWO MOLD PARTS WHILE SAID PARISON IS AT SAID ORIENTATION TEMPERATURE, BY THE INTRODUCTION OF INTERNAL FLUID PRESSURE, VENTING SAID THUS FORMED HOLLOW ARTICLE TO RELIEVE SAID PRESSURE AND OPENING SAID MOLD PARTS ENCLOSING SAID THUS FORMED HOLLOW ARTICLE TO REMOVE SAME, THE IMPROVEMENT COMPRISING: OPENING SAID MOLD PARTS OF A TIME AFTER SAID VENTING IS BEGUN, WHICH TIME IS LESS THAN THE TIME REQUIRED FOR SAID VENTING TO BE COMPLETE, THE VOLUME OF SAID HOLLOW ARTICLES BEING MEASURED AND THE TIME INTERVAL BETWEEN SAID BEGINNING OF VENTING AND SAID OPENING OF SAID MOLD PARTS BEING ADJUSTED IN RESPONSE TO THE AMOUNT SAID MEASURED VOLUME IS DIFFFERENT FROM A PREDETERMINED VALUE TO ACHIEVE A DIESIRED VOLUME.
IN A METHOD FOR FORMING ORIENTED CLOSED END HOLLOW ARTICLES COMPRISING HEATING A THERMOPLASTIC PARISON TO ORIENTATION TEMPERATURE, EXPANDING SAID PARISON OUT AGAINST A MOLD FORMED BY TWO MOLD PARTS WHILE SAID PARISON IS AT SAID ORIENTATION TEMPERATURE, BY THE INTRODUCTION OF INTERNAL FLUID PRESSURE, VENTING SAID THUS FORMED HOLLOW ARTICLE TO RELIEVE SAID PRESSURE AND OPENING SAID MOLD PARTS ENCLOSING SAID THUS FORMED HOLLOW ARTICLE TO REMOVE SAME, THE IMPROVEMENT COMPRISING: OPENING SAID MOLD PARTS OF A TIME AFTER SAID VENTING IS BEGUN, WHICH TIME IS LESS THAN THE TIME REQUIRED FOR SAID VENTING TO BE COMPLETE, THE VOLUME OF SAID HOLLOW ARTICLES BEING MEASURED AND THE TIME INTERVAL BETWEEN SAID BEGINNING OF VENTING AND SAID OPENING OF SAID MOLD PARTS BEING ADJUSTED IN RESPONSE TO THE AMOUNT SAID MEASURED VOLUME IS DIFFFERENT FROM A PREDETERMINED VALUE TO ACHIEVE A DIESIRED VOLUME.
Claim 2
Dependent Claim
143 words
IN A METHOD FOR FORMING ORIENTED CLOSED END HOLLOW ARTICLES COMPRISING HEATING A THERMOPLASTIC PARISON TO ORIENTATION TEMPERATURE, EXPANDING SAID PARISON OUT AGAINST A MOLD FORMED BY TWO MOLD PARTS WHILE SAID PARISON IS AT SAID ORIENTATION TEMPERATURE, BY THE INTRODUCTION OF INTERNAL FLUID PRESSURE, VENTING SAID THUS FORMED HOLLOW ARTICLE TO RELIEVE SAID PRESSURE AND OPENING SAID MOLD PARTS ENCLOSING SAID THUS FORMED HOLLOW ARTICLE TO REMOVE SAME, THE IMPROVEMENT COMPRISING: OPENING SAID MOLD PARTS OF A TIME AFTER SAID VENTING IS BEGUN, WHICH TIME IS LESS THAN THE TIME REQUIRED FOR SAID VENTING TO BE COMPLETE, THE VOLUME OF SAID HOLLOW ARTICLES BEING MEASURED AND THE TIME INTERVAL BETWEEN SAID BEGINNING OF VENTING AND SAID OPENING OF SAID MOLD PARTS BEING ADJUSTED IN RESPONSE TO THE AMOUNT SAID MEASURED VOLUME IS DIFFFERENT FROM A PREDETERMINED VALUE TO ACHIEVE A DIESIRED VOLUME.