Rigid-when-wet paperboard containers and their manufacture
AssigneeAltor Box Board Company
InventorsRobert M. Wilkinson, James R. Lyon
Life of this patent
Estimating the term…
Abstract
Rigid-when-wet, but foldable, corrugated paperboard and process of making same by applying phenolic resin to contiguous surfaces of the outer liner, the medium, and the inner liner without substantially altering the hygroscopicity of the exposed faces of the liners, and adhering the three components together before the resin is cured.
Claims7
The process of making rigid-when-wet container-board comprising, surface-treating one face of a sheet of paperboard without substantially effecting the moisture absorbing attributes of its opposite face by printing thereon discretely metered increments of a mixture of phenolic resin in a liquid vehicle in minutely spaced relationship, surface-treating both faces of a second sheet of paperboard with a mixture of phenolic resin in a liquid vehicle, and surface-treating one face of a third sheet of paperboard without substantially effecting the moisture absorbing attributes of its opposite face by printing thereon discretely metered increments of said mixture of phenolic resin in a liquid vehicle in minutely spaced relationship, immediately removing a substantial part of said liquid vehicle from the said first, second, and third sheets, and after the vehicle is in substantial part removed from all of said sheets, corrugating said second sheet, and the sheets are laminated with said one face of said first-mentioned sheet and third sheet in at least partial contact with opposite faces of said second sheet.
Dependencies are inferred from the claim text.