Heat plate unit and double facer for fabricating double-faced corrugated fiberboard
US8307870B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2009 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Dec 31, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31F1/2881
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A double facer that fabricates a corrugated fiberboard and that includes heat plate units having thin walls aims at improving the heat conductive efficiency to fiberboard sheets in order to enhance responsibility to the setting temperature and concurrently avoiding thermal deformation of the heat plates due to a difference in temperature between the top surface and the bottom surface. The heat plate unit for fabricating a double-faced corrugated fiberboard included in a double facer that fabricates a double-faced corrugated fiberboards by gluing a single-faced corrugated fiberboard in a swath form and a linerboard together, the heat plate, being horizontally disposed and having a top surface on which the single-faced corrugated fiberboard in a swath form and the linerboard overlapping and being glued together travels, includes: a rib 32, disposed on a bottom surface of a heat plate 31, extending in a width direction of the heat plate 31, being coupled to the heat plate 31 to form an integrated body, and being capable of thermal expansion; and temperature controlling means that controls a temperature of the heat plate 31 and a temperature of the rib 32 independently of each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.