Machine for making containers by blow-moulding plastic parisons
US5863571A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Sep 2, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2067/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a machine for manufacture of containers (13), such as bottles, pots, and all other types of hollow bodies, by heat treating, then blow-molding, plastic preforms (1). The machine includes at least two wallet-type molds (41, 44) positioned on the periphery of a circular conveyor. Each mold incorporates at least two mold cavities. The machine includes a preform heat-treatment apparatus in which the pitch (P1) between the longitudinal axes of two successive preforms is smaller than the pitch (P2) between the longitudinal axes of two adjacent cavities belonging to the same mold, and means (5A) for modifying the pitch of the preforms between the drive mechanism and a mold. The machine is characterized by the fact that the pitch-modification means (5A) incorporate at least two adjacent movable devices (52) which are configured so as to be adjustable to the first pitch (P1) when they are positioned opposite the drive mechanism and to the second pitch (P2) when they are positioned facing the means (5B) designed to transfer the performs to the molds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.