Method and apparatus for making a profile bag structure

Abstract

Abstract METHOD AND APPARATUS FOR PREPARING CONTOURED BAGS FROM PLURAL LAYERS OF HEAT SEALABLE FLEXIBLE FILM, THE APPARATUS COMPRISING WEB RETAINING MEANS FOR RECEIVING AND RETAINING A SUPPLY OF FLEXIBLE FILM THEREON, ALONG WITH A WEB SUPPORTING SURFACE FOR RECEIVING FILM FROM SAID RETAINING MEANS IN THE FORM OF A WEB, THE SUPPORTING SURFACE DEFINING A WEB TRAVELLING PLANE. DRAW ROLL MEANS ARE PROVIDED FOR IMPARTING INTERMITTENT MOTION AND DWELL TO THE WEB AS IT TRAVELS ALONG THE WEB TRAVELING PLANE. A FIRST WEB TREATING STATIONN IS DISPOSED ALONG THE SUPPORT SURFACE WITH WEB SEALING-SERRATING MEANS BEING PROVIDED FOR MAKING INTERMITTENT CONTACT WITH SPACED POINTS ALONG THE WEB FOR FORMING A GENERALLY CONTINUOUS SEALED-SERRATION LINE. THE SEALED-SERRATION LINE DEFINES A PREDETERMINED ISOLATED SCRAP ZONE ALONG THE WEB AND IS ADAPTED FOR EASY REMOVAL THEREFROM. A SECOND WEB TREATING STATION IS DISPOSED ALONG THE SUPPORT SURFACE DOWNSTREAM FROM THE FIRST WEB TREATING STATION, THE SECOND TREATING STATION HAVING WEB WELDING AND SEVERING MEANS IN THE FORM OF A WELDING BAR FOR MAKING INTERMITTENT CONTACT WITH THE WEB DURING WEB-DWELL TO WELD AND SEVER THE WEB TO FORM INDIVIDUAL REPEATING FLEXIBLE FILM PRODUCTS SUCH AS BAGS THEREFROM. IN THIS FASHION, CONTOURED BAGS SUITABLE FOR RETAINING IRREGULARLY SHAPED ARTICLES SUCH AS BANANAS AND THE LIKE MAY BE PREPARED. THE APPARATUS MAY OPTIONALLY INCLUDE RE-WIND MEANS WHICH ARE ARRANGED TO WIND THE FLEXIBLE FILM PRODUCT UPON A PRODUCT ROLL, IT BEING UNDERSTOOD THAT THE WELDING BAR WOULD BE ADJUSTED TO MERELY SEAL AND NOT SEVER THE SIDS OF THE BAGS BEING FORMED ALONG THE ROLL.

Inventors

• 👤 R Adams

Bibliographic Details