 Spring biased apparatus for maintaining precast panels in a stable removable position in a vertical slot |
| In a principal aspect, the present invention comprises an apparatus as well as a method for wedging ... |
|
| Channel assembly for mounting building panels |
| OF INVENTION The channel assembly of the invention is used to mount exterior panels onto the ... |
|
| Expansion joint fire barrier systems |
| The present invention relates to improvements in fire resistant expansion joint structure, which ... |
|
| Channeled wall panel |
| Channels according to the present invention include no back surface. They instead feature a closed ... |
|
| Metal panel structures |
| In accordance with one aspect the invention resides in a structural panel formed from sheet ... |
|
| Fastened structure of siding boards |
| The present invention has been made in view of the aforementioned circumstances, and therefore, an ... |
|
| Architectural building panel |
| The invention provides an architectural building panel in the form of a sealed glazed unit ... |
|
| Encapsulated glazing product |
| A complete multi-layer glazing unit as contemplated by this invention includes, essentially, a ... |
|
| Impact-impeding pane/frame structure |
| OF THE PREFERRED EMBODIMENT Referring now to the drawing in detail, and first to FIG. 1 thereof, ... |
|
| Wood and vinyl hybrid residential door frame |
| The present invention is directed generally to door frame assemblies, attachments, and components ... |
|
|
Refillable polyester container and preform for forming the same
| Details |
Inventors: Krishnakumar, Suppayan M.; Collette, Wayne N.; Nahill, Thomas E.;
Assignee: Continental PET Technologies, Inc. (Florence, KY)
Primary Examiner: Nold; Charles
Assistant Examiner:
Attorney, Agent or Firm: Wolf, Greenfield & Sacks, P.C.
This relates to a returnable/refillable container in the form of a blow molded polyester biaxially oriented bottle wherein the container includes a domed base construction wherein the wall thickness gradually and smoothly increases to a maximum at the center of the dome. This also relates to a specially configurated preform which is blow molded to form the container and a specially configurated blow mold cavity for receiving a preform having a lower axial projection in the fore of an elongated gate without crushing. |
|
DETAILED DESCRIPTION We claim: 1.
A preform for use in blow molding a container suitable for refilling, the preform being an injection molded polyester member having: a closed bottom end and an open top end; a neck finish at the open top end; a body-forming portion which on blow molding will form a body of the container; a shoulder-forming portion disposed between the neck finish and the body-forming portion and which on blow molding will form a shoulder of the container; and a base-forming portion which on blow molding will form a base of the container, the base-forming portion having a generally hemispherical outer surface at the closed bottom end and a thickened portion between the bottom end and the body forming portion, the thickened portion having an increased wall thickness as compared to the wall thickness of the body-forming portion; characterized in that the base-forming portion has a generally hemispherical inner surface at the bottom end and the thickened portiom has an upper cylindrical portion of the increased wall thickness and a lower tapered portion which gradually reduces in wall thickness towards the bottom end.
2.
A preform according to claim 1, wherein the generally hemispherical outer and inner surfaces of the bottom end have different centers so that there is a continuing gradual reduction in wall thickness in the bottom end.
3.
A preform according to claim 1 or 2, wherein the bottom end has a centrally-located thickened gate region joined to the inner and outer surfaces in a smooth connection free of sharp corners.
4.
A preform according to claim 3, wherein the bottom end adjacent the thickened gate region has e wall thickness which is 50-70% of the thickness of the upper cylindrical portion.
5.
A preform according to claim 4, wherein the polyester is polyethylene terephthalate (PET).
6.
A preform according to claim 5, wherein the thickness of the upper cylindrical portion is about 10-30% greater than the thickness of the body-forming portion.
7.
A preform according to claim 1, wherein the upper cylindrical portion is joined to the body-forming portion by a tapered portion which gradually reduces in thickness from the upper cylindrical portion to the body-forming portion
|
| Related patents |
|
|
Glazing bead
What is claimed is: 1. A glazing bead adapted to secure a second, larger thickness of insulated window means in a window frame means designed to normally receive a first,...
|
|
|
Lamination of leaded glazing panels
I claim: 1. A method of producing a laminated leaded glazing unit comprising: arranging a first glazing panel in a spaced apart confronting relationship with a leaded ...
|
|
|
Decorative utilitarian glass block
I claim: 1. A glass block, said glass block having a one-piece construction, said glass block being homogeneous in composition, said glass block comprising only a ...
|
|
|
Panel joint for assembling panel members
Briefly, the present invention is a new and improved panel joint, and a method for assembling first and second upstanding metallic panel members, which joint and method ...
|
|
|
Hangar
What is claimed is: 1. A hangar having a gateway opening, a gate girder (5) lying on its ends on end supports of the hangar and overlying the gateway opening, and a ...
|
|
|
Prefabricated window unit with air conditioning system
It is therefore one aim of the present invention to provide a prefabricated window unit with an air conditioning system in which a cooling and heating efficiency is ...
|
|
|
Perimeter clip
OF THE INVENTION As seen in FIG. 7, a vertical dry or plastered wall 20 is supported from structure 21. The wall 20 forms one side of a room within a building and ...
|
|
|
Masonry control joint guide
The present invention addresses the above-mentioned problems, as well as others, by providing an easy to use control joint plumbing system and method. In a first aspect, ...
|
|
|
Garage door decorative cover
It is an object of the invention to provide an additional type of decorating ornament for residential dwellings. This decorative ornament can be easily affixed to a ...
|
|
|
Rock bolting
What I claim is: 1. In a method of reinforcing a rock face with at least one rock bolt, said method comprising: drilling a hole in the rock face, inserting a rock bolt ...
|
|
|
Screen Walls 
