Not applicable.
The disclosure herein relates generally to plastic hinge shims and to a sheet of such shims. More particularly, the disclosure relates to shims and methods to facilitate door mounting with use of shims and sheets therein for supporting door hinges in a manner which results in the desired alignment of the mounted door to a door jamb.
Applicant is the named inventor of U.S. Pat. No. 7,536,747, the entire disclosure of which, are incorporated herein by reference. In the event of inconsistent usages between this document and the document so incorporated by reference, the usage in the incorporated references should be considered supplementary to that of this document; for irreconcilable inconsistencies, the usage in this document controls.
In the construction of buildings, both commercial and residential, tapered workpieces, such as shims, are commonly used. Shims are used to fill gaps and are placed under hinges to align items such as doors or windows in their jamb, or to adjust such items to fit properly. Thus, they avoid use of plane or sanding of such items, which would then require refinishing.
Wood shims have long been the material of choice in many construction projects, particularly for residences due to their availability, being inexpensive and relatively easy to work with. Conventional wood shims have certain deficiencies that provide room for improvement, however. First, wood pieces of this size can split or splinter, especially if forced into position and/or struck with a hammer or tool. Splitting or splintering can defeat the purpose of the shim and can cause safety problems. Second, the inherent properties of wood, being relatively porous, cause wood to compress, especially if substantial forces are applied against it, which can defeat the purpose of the shim. Third, as an organic material, wood can decay or degrade over time. Fourth, although relatively easy to handle and alter in size, wood shims still require tools and substantial handling, which is time-consuming.
In the past, shims were typically fashioned from cardboard boxes or nail boxes, to slip under the hinge and thus change the door's alignment to the jamb. Cardboard shims are inherently weak and expose the door to settling as the cardboard shims compress. Meanwhile, in the case of metal shims, such shims lack adjustability due to its single thickness and inflexible properties.
Shims are commonly nailed into place so as not to fall or slide, especially when an exact location often times must be maintained. Accordingly, wooden shims cannot always be held by a nail, thereby resulting in a shim that falls or will not maintain a constant location. Moreover, plastic shims can be secured firmly in place by a nail or screw without splitting or compromising its position. Due to the current molding process of plastic shims, commonly a hinge screw, screws, or pins need to be fully backed out of the hinge plate or so that a shim can be slid behind the hinge. This costs additional time and money.
In U.S. Pat. No. 5,953,862 a plastic shim is disclosed. Its shape and design are not that of the common shim acceptable for conventional construction purposes, however. In U.S. Pat. No. 6,155,004, a tapered plastic shim and a sheet of such shims is disclosed. But, such shims do not have features to move them further into a cavity under a hinge or out towards a hinge pin. Moreover, a group of such shims cannot be folded together to form a thicker shim required for application, since they cannot be readily broken lengthwise for separation or detachment from the sheet. Such shims also do not have features which allow for placement of the shim behind the hinge without first removing all the screws and pins.
What is needed is an improved workpiece, which is of uniform size and shape, of homogeneous consistency, of dependable quality, so that it does not split or break easily or unintentionally. Further needed is a shim workpiece that will easily slip into the cavity under the hinge without the need for trimming to fit into the cavity or removal of the hinge screws or pins. Further, the workpiece should be of tapered design in which either the thin or thick edge of the hinge shim can be inserted first to provide movement of the hinge pin toward or away from the doorjamb.
Certain deficiencies of the prior art are overcome by providing embodiments of an apparatus, kit, and system in accordance with the present disclosure. The present disclosure provides an improved plastic shim or workpiece useful in the construction industry. Each workpiece is a tapered hard plastic body with a thicker section and a thinner section and has special characteristics for its intended purpose. Each workpiece is slotted such that it may slip behind a hinge without the complete removal of the hinge screws upon the shim being folded or separated. The workpieces are manufactured to be of uniform size and shape, of homogeneous consistency, and of dependable quality so that they do not change with time. Moreover, they are of such dimensions, hardness, and other characteristics as are especially suited for use as a hinge shim or other workpiece and which overcome the disadvantages of other types of shims.
Further advantages of the present disclosure may become apparent to those skilled in the art with the benefit of the following detailed description of the preferred embodiments and upon reference to the accompanying drawings in which:
Referring now to the drawings, like reference numerals designate identical or corresponding features throughout the several views. Further, described herein are certain non-limiting embodiments of a shim and sheet thereof for proper mounting of doors to respective hinges.
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Having disclosed the structure of the preferred embodiments, it is now possible to describe its function, operation, and use. The present disclosure provides an improved plastic hinge shim or work piece useful in the construction industry. The work pieces are of uniform size and shape, of homogeneous consistency, and of dependable quality, so that they do not change with time. Moreover, they are of such dimensions, hardness, and other characteristics as are especially suited for use as a hinge shim or other work piece and which overcome the disadvantages of other types of shims.
The slots permit the shim 100, shim 200, or shim 300 to be moved further into the cavity or out toward the hinge's pin to provide a finer adjustment of the door alignment. Each hinge shim has transverse break lines, or score line 110, score line 210, or score line 310 so that segments can be broken off. Additionally, the hinge shims are molded in a sheet of work pieces such that they can be folded to form a thicker hinge shim as required for application. The hinge shims help in quick alignment of the door in the jamb and avoid the requirement of finishing as a result of sanding or planning. When folded into a group of two or three shims, the fold slot 112, open slot 108, and slot 106 may be aligned with each other for ease of inserting the screws. Moreover, when folded or separated, shim 100, shim 200, or shim 300 may cause for slot 106, 206, or 306 to be open to an edge of shim 100, shim 200, or shim 300. When folded or separated, fold slot 112, and in combination with all other slots, may be moved behind a door hinge without removing the screws of the hinges to the door jamb. Shim 100, shim 200, or shim 300 may be separated by pulling or cutting.
The shim may be molded of plastic material, such as polystyrene, polypropylene or high impact polystyrene, that is hard, durable, of high strength and impact resistance, and of homogeneous consistency. The shim 100, shim 200, or shim 300 may have opposite, flat, rectangular front and back shimming surfaces. Additionally, the shim may be molded as one piece.
Each shim 100, shim 200, or shim 300 may have transverse breakable means on the thicker and thinner sections and on the opposite surfaces of each work piece. Additionally, the shim 100, shim 200, or shim 300 are molded in a sheet of three shims joined such that they can be folded to form a thicker shim as required for the application. Thus, they can be used as single or as a pair or as three folded together, forming the thickness of shim required for the application.
The tapered design of the hinge shim 100, shim 200, or shim 300, having thinner and thicker sections may be contemplated to provide additional movement of the door in the jamb for a given thickness. The thinner edges may be adequately described as acuate. Thus, a hinge shim thickness of 0.050 inches at the thick end will displace the hinge pin approximately 0.060 inches. This additional movement may be due to the tapered design of the shim. Additionally, the thinnest section of the shim 100, shim 200, or shim 300 may typically be placed furthest into the cavity under the hinge, thus minimizing the amount of lifting of the hinge at the edge mortised into the door's jamb. This provides a more aesthetically pleasing appearance than a shim of constant thickness, as the shim of constant thickness displaces the edge of the hinge above the surface of the jamb by the amount of the shim thickness.
The shims may be designed and manufactured, slightly smaller than the hinge itself and may have a rounded corner to the thin edge 104. Moreover, this rounded corner may permit easy insertion under a door hinge by reducing frictional contact or by becoming ensnared during the installation process. Thus, the shim may easily slip into the cavity under the hinge without the need for trimming to fit the cavity based on the elongated shape. Additionally, open slot 108 and fold slot 112 are contemplated for use with the hinge screw and may be open to the thin edge to permit the shim to be inserted into the cavity without removing any hinge screw. Further, upon folding or separating a shim 100, shim 200, or shim 300, slot 106 may then become open to an edge and is represented in this configuration as fold slot 112. Rather, the hinge screws can be loosened one and one half turns and the door moved to open the gap under the hinge and the shim(s) placed into the cavity while leaving the screws in place. Next, the hinge screws are tightened.
The shim 100, shim 200, or shim 300 as illustrated in
The shims can provide movement of the hinge pin in either direction. Due to the tapered dimensions of the shim, they may be installed either by inserting the thin edge first into the cavity under the hinge or by alternatively inserting the thick edge first. These two options may move the hinge pin in opposite directions. Thus, the thin edge of the shim is inserted first, if the door to jamb gap, which is opposite from the hinge being adjusted, requires reduction. If the gap is too narrow, then the thick edge can be inserted first, thereby moving the hinge pin in the opposite direction and opening the door to jamb gap.
Particular uses and embodiments of the plastic shim have been disclosed. However, other work pieces, especially tapered ones such as a stake and other items particularly those suited for the building industry, could equally be incorporated by use of the same principles described above. Therefore, although preferred embodiments of the present disclosure have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the disclosure. It is not intended that these embodiments illustrate and describe all possible embodiments. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the disclosure.
Accordingly, it is not intended that the disclosure be limited except by the appended claims. Insofar as the description above and the accompanying drawings disclose any additional subject matter that is not within the scope of the claims below, the disclosures are not dedicated to the public and the right to file one or more applications to claim such additional embodiments are reserved.