Packing case tab slitter
US4551964A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1984 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Nov 30, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B7/20
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Cardboard packing cases, which have been loaded with bottles or the like, are fed to apparatus for severing the top flap connecting tabs at diagonally opposite corners of the case. These tabs are provided to hold the top flaps of the case in place during loading, but must be severed prior to closing and/or gluing of the top flaps at a succeeding stage in the packing of the product. The apparatus includes an infeed station where the cases are separated, by slowing each case on a flight bar conveyor having its flight spaced less than the length of the case, and then accelerating the case on the infeed conveyor to match the speed of a pocket chain conveyor. The case has its forward end lifted, and opposite corners tilted, on this pocket chain conveyor to spread the top flaps at the two corners of the case without connecting tabs. Guide plates on either side of the pocket chain conveyor serve to guide the case so that fixed knives cut both tabs without necessity for turning the case through 90 degrees. The front tab is cut by dropping the front end of the case downwardly as it returns to a horizontal position on the pocket chain conveyor. Front and rear top flap tuckers follow an upwar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.