Method for forming paper boxes and the like
US4283190A · kind A · utility
Inventors
Key dates
| Filing date | Jan 30, 1980 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Jan 30, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B50/44
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A box blank with receptacle and cover sections each with side flaps and end flaps has a hinge panel joining the two sections. A vacuum pickup draws a flat blank from a supply stack to a feed carriage which transfers the blank past sprays that apply glue to the end flaps. The speed of the carrier varies, but beneath the glue sprays speed is uniform. The carriage delivers the glue coated box blank to a former and a tray forming head having concave and convex interacting pressure plates which maintain doubled over end flaps of each section in a concave configuration with respect to the box while the folded end sections are adhered to form a box tray from the blank. Former flap benders cooperate with the tray forming head to shape the box tray. A second vacuum pickup clasps the formed tray at the hinge panel and draws a shaped tray from the forming head into engagement with folding elements such that the cover and receptacle sections are bent together along the hinge panel to form a closed box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.