Corrugated-paperboard wrapper for packaging electric lamps, and resulting lamp package
US4007836A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1974 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Apr 10, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S229/94
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The ability of an open-ended corrugated-paperboard lamp wrapper to withstand compressive forces and retain an inserted frictionally-gripped lamp are both enhanced by orienting the corrugations so that they extend obliquely across the walls of the wrapper at an angle of from about 10.degree. to 35.degree. with respect to the transverse axis of the wrapper. The compressive strength of a single-lamp wrapper fabricated from single-face corrugated paperboard having corrugations offset by 20.degree. is increased by 19% and lamp-retention is increased by 20% compared to a conventional wrapper having corrugations that extend parallel to the transverse axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.