Rotary ultrasonic sealing
US7892375B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2007 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Nov 26, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1737
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is an apparatus for forming an ultrasonic weld that includes a sonotrode having an ultrasonic actuator coupled to an elongate sealing end face for delivering ultrasonic energy to the webs in the sealing gap and a rotating cylindrical anvil having at least one raised portion extending longitudinally along an outer surface thereof. The raised portion has a radially outer surface, whereby the sealing gap is defined intermittently between the end face of the sonotrode and the radially outer surface of the raised portion of the anvil as the raised portion rotates past the end face of the sonotrode. The elongate sealing end face of the sonotrode has a substantially helical surface, whereby the sealing gap travels helically along the surface as the raised portion of the anvil cylinder rotates past the end face of the sonotrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.