Locking sandwich collar
US6209784A · kind A · utility
4Cited by
9References
5Claims
0Family size
Inventor
Key dates
| Filing date | Nov 16, 1998 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Nov 16, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S229/938
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention discloses an improved, cylindrical, paperboard collar for placing around a specialty sandwich such as a multilayer hamburger or such. The collar blank is cut from flat paperboard stock in the form of an elongated rectangle which is folded back over itself having its free ends adhesively attached to one another whereby the resulting flat preform may be expandingly opened to form a cylindrical configuration. Two tongue like locking tabs are cut into the paperboard surface which when the preform is expanded to form an upright cylinder the tabs act to maintain the open cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.