Ultrasonic packaging machine
US4193833A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1978 |
| Grant date | Mar 18, 1980 |
| Priority date | — |
| Expiry date | Apr 24, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7166
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus is disclosed for forming a seal between layers of a carton of thermoplastic coated paperboard material and the like in a sealant activating station wherein the sealant is activated and a clamping and sealing station wherein the sealant is allowed to cool and set under pressure to form a seal between the layers. The carton first moves to the activating station wherein the layers to be sealed are engaged on opposite surfaces by a vibrating horn and a movable first backup member in the form of an anvil for a time sufficient to activate the thermoplastic material which serves as a sealant. A first adjustable overtravel spring assembly biases a first backup means. The carton then moves to the clamping and sealing station where a movable pressure pad and a second backup member engage the layers having the activated thermoplastic thereon for a predetermined period of time to permit the activated thermoplastic to cool, set and form a seal. A second adjustable overtravel spring assembly biases a pressure pad. The carton is carried by a conveyor assembly, which is synchronized with the movement of the first back member and the pressure pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.