document: Flexible air-jet tooling for vibratory bowl feeder systems Vibratory bowl feeders -LRB- VBFs -RRB- are machines that feed various small parts in large volume automatic assembly systems . Their shortcomings , like inflexibility and the propensity to jam , stem from the use of mechanical orienting devices . Air jet based orienting devices can be implemented to overcome these limitations . Applications of passive and active air jet based orienting devices that replace conventional devices for the VBF are discussed . Passive devices , which reject incorrectly oriented parts , are discussed first . Active air jet based orienting devices are then introduced to further improve the flexibility of VBFs . Since active devices reorient parts into a desired orientation , the part motion under their influence is analyzed . A number of tests demonstrate the feasibility and advantages of these new orienting devices
doc_bio_tags: O O O O O O O O B I I O O O O O O O O O O O O O B I I O O O O O O O O O O O O O O O O O O B I O O O O B I O O O O O O O O O O O O B I I O B I O O O O O O O O O O O O O O O O O O O O O O O B I I O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I
extractive_keyphrases: vibratory bowl feeders automatic assembly systems active air jet orienting devices
abstractive_keyphrases: passive air jet parts feeding