B PERFORMING OPERATIONS; TRANSPORTING
B29 WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
65/00 Joining; or sealing; of preformed parts; , e.g. welding of plastics materials; Apparatus therefor
B29C65/78 Means for handling the parts to be joined, e.g. for making containers or hollow articles; , e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
B29C65/7802 Positioning the parts to be joined, e.g. aligning, indexing or centring