Attachment for forming envelopes
US5047000A · kind A · utility
2Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Nov 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A readily removable apparatus for use with an envelope blank-forming machine for the forming of envelopes from those blanks. The apparatus comprises an adhesive sprayer for applying adhesive on one side of a side flap of the envelope blank. It also includes an air lifter to lift a leading edge of the blank into engagement with a buckle bar. A plow folds the side flaps over a rear portion of the envelope blank, and rollers press the adhesive-covered side of the side flaps onto a rear portion of the blank to form an envelope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.