Multi-ply linear draw support post

Abstract

A post of cardboard formed by advancing layers of cardboard linearly toward a mandrel and wrapping the layers around the mandrel with the edges of the layers parallel to the axis of the mandrel, bonding the layers together to form tube, advance the tube linearly along the mandrel, and then cut it to the desired length. In one embodiment, the tube is a multi-grade structure having one or more relatively low-grade layers in the middle of the tube wall and relatively high-grade layers on the inside and outside of the tube. In another embodiment, one or more intermediate layers are embossed or corrugated to increase their effective thickness.

Description

technical field [0001] The present invention relates to stanchions for packaging an object or a collection of objects in a carton or the like, said stanchions for supporting axial loads exerted on the carton, and optionally also for example at the corners of the packed objects Provides lateral cushioning or protection. In particular the invention relates to such posts formed into tubular structures from cardboard material. Background technique [0002] When packing one or more objects in a carton or other packaging (where the carton or packaging itself does not provide sufficient strength to support axial loads and / or cushion the object(s), especially at the corners lateral impact), known devices include strut and / or corner protectors within the package to provide the necessary axial load support and / or lateral impact protection. Such post or corner protectors are usually made of cardboard material. One known form of corner protector or strut is formed by wrapping a sheet...

AI Technical Summary

Problems solved by technology

[0004] The method of said U.S. Patent No. 6,186,329, while effective for producing multi-stage pipe structures, must be a batch-type method in which a single pipe is made one at a time; batch methods are inherently less efficient, especially Since the starting sheet needs to be prepared from three separate pieces of cardboard

This method will be even less efficient if used to produce pipes with more complex layer arrangements (e.g. high / low / high / low / high grade arrangements)

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