An envelope opening apparatus for mail assembly operations which employs timed intermittent bursts of compressed air or other gas. One or more gas jets are used in association with an inserter arm, and envelopes are sequentially conveyed past the inserter arm and gas jets. As each envelope is...http://www.google.es/patents/US5722221?utm_source=gb-gplus-sharePatente US5722221 - Envelope opening apparatus
