Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

PLASTIC MOLDING TO CONTROL CREEP

IP.com Disclosure Number: IPCOM000024978D
Original Publication Date: 1983-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 58K

Publishing Venue

Xerox Disclosure Journal

Abstract

Complex molded plastic parts can be used for functional frames and bases on automatic reproducing equipment. At high compression loadings, the creep (dimensional change over time) of the plastic material may be stabilized and the molded plastic part strengthened by providing at least one cavity within the molded article having a reinforcing element inserted in it. Preferably, the cavity is integrally molded into the plastic part and is oriented such that the reinforcing element is in the direction of loading stress. Figures la, Ib, lc illustrate the simplest embodiment wherein a thin column or rod is inserted in a hole formed in the molded part. While the unreinforced plastic part is subject to creep and the unsupported thin column is subject to buckle, when used together the reinforced molded plastic part is capable of supporting substantial loads without creep or buckle. Other reinforcing shapes including angular shaped rods, channels and wire mesh can be precisely located in cavities to provide a reinforced plastic part. This structure enables the use of plastic frames which can take design loads in compression and bending.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 98% of the total text.

Page 1 of 2

IEROX DISCLOSURE JOURNAL

PLASTIC MOLDING TO CONTROL CREEP Proposed Kent W. Hemphill Classification

U.S. C1. 52/573 Int. C1. E04b 1/68

FlG la FlG lc

Complex molded plastic parts can be used for functional frames and bases on automatic reproducing equipment. At high compression loadings, the creep (dimensional change over time) of the plastic material may be stabilized and the molded plastic part strengthened by providing at least one cavity within the molded article having a reinforcing element inserted in it. Preferably, the cavity is integrally molded into the plastic part and is oriented such that the reinforcing element is in the direction of loading stress. Figures la, Ib, lc illustrate the simplest embodiment wherein a thin column or rod is inserted in a hole formed in the molded part. While the unreinforced plastic part is subject to creep and the unsupported thin column is subject to buckle, when used together the reinforced molded plastic part is capable of supporting substantial loads without creep or buckle. Other reinforcing shapes including angular shaped rods, channels and wire mesh can be precisely located in cavities to provide a reinforced plastic part. This structure enables the use of plastic frames which can take design loads in compression and bending.

Volume 8 Number 2 March/April 1983 77 -

[This page contains 1 picture or other non-text object]

Page 2 of 2

March/April 2 Number 8 Volume XEROX 78 DISCLOSURE JOURNAL 1983

[This page contains 1 p...