Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1996-10-31
1999-01-26
Lorin, Francis J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156213, 156478, B65H 3704
Patent
active
058633693
DESCRIPTION:
BRIEF SUMMARY
This invention relates to continuous mouldings and methods of production thereof.
BACKGROUND OF THE INVENTION
This invention has particular but not exclusive application to production of continuous cornice and the like, and for illustrative purposes reference will be made to such application. However, it is to be understood that this invention could be used in other applications, such as in production of skirting mouldings and other substantially continuous architectural mouldings.
Traditionally and prior to the introduction of paper faced plaster products, cornices for use in conjunction with wall plaster or plaster board was moulded from fibrous plaster. Fibrous plaster cornices can adopt complex patterns and shapes but the material is heavy and brittle, requires skilled installation, and is labour intensive. The material is also porous and generally somewhat pitted and accordingly cannot be readily spray-painted, since the liquid binder in the paint is absorbed rapidly into the porous surface.
The advent of paper covered plaster cornice and its relative ease of fixing and handling has made this material ubiquitous in the domestic and commercial plastering trade. The paper coated cornice at least partially overcomes the disadvantage of limitation of painting methods of fibrous plaster cornices but the process of manufacture severely limits the shapes and sizes which can be produced. The material, being based on reinforced plaster, is still heavy, resulting in difficulties in shifting and transport. Whilst the material is more flexible than fibrous plaster mouldings, excessive flexing of the cornice under its own weight will cause damage to the plaster core and disrupt the surface form of the cornice. Accordingly, it still requires several pairs of hands to install, particularly for long runs of the cornice.
The limitation on shapes and sizes of paper covered cove cornice is imposed by the technical constraints of manufacture. The cornice is made by means of a wet plaster process where uncured plaster slurry is formed and extruded onto a cove shape to form the shape prior to initial set of the plaster. Mechanical apparatus then folds over the paper coating and the continuously produced cove is cut to length.
The present invention aims to substantially alleviate at least one of the above disadvantages and to provide continuous mouldings and methods for production thereof which will be reliable and efficient in use. Other objects and advantages of this invention will hereinafter become apparent.
With the foregoing and other objects in view, this invention in one aspect resides broadly in a method for producing continuous architectural mouldings including the steps of: selected profile; means having a working surface of profile complementary to said outer surface.
The moulding core member may be provided as a substantially continuous material or may be handled in discrete lengths. The moulding core member may be of any suitable material including thermoplastic or thermoset polymeric foam materials, extruded plastic material, wood such as red cedar, or the like. Preferably the material is selected for lightness with sufficient stiffness either of itself or in laminate with the cover member to be handled in convenient lengths. Preferably, the material is selected such that some flexibility or resilience is maintained to accommodate some building movement when installed as an architectural moulding. Preferably, the material is selected from open cell or closed cell foams of polystyrene for its ease of thermoforming or abrasive forming.
The core member may be formed by any suitable means such as by continuous grinding to profile or, in the case of the preferred polystyrene foam, by hot wire cutting. Preferably, the selected profile is selected to be complementary with itself such that pairs of finished moulding may be stacked face to face to protect the paintable surface thereof in transport and handling. If the profiles are cut by hot wire cutting, the profile may be selected such that complementary surfaces
REFERENCES:
patent: 4539169 (1985-09-01), Nixon et al.
patent: 4612152 (1986-09-01), Kawabata et al.
patent: 5171499 (1992-12-01), Cehelik et al.
Clarke Paul Rodney
Clarke Rodney Charles
Dreamtank Pty Ltd
Lorin Francis J.
LandOfFree
Continuous mouldings and methods of production thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous mouldings and methods of production thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous mouldings and methods of production thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1446871