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・ Striated muscle tissue
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・ Stretchable electronics
・ Stretched C
・ Stretched exponential function
・ Stretched grid method
・ Stretched Rohini Satellite Series
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・ Stretcher (disambiguation)
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Stretcher bar
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・ Stretching the Truth
・ Stretchmo


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Stretcher bar : ウィキペディア英語版
Stretcher bar

A stretcher bar is used to construct a wooden stretcher used by artists to mount their canvases.
They are traditionally a wooden framework support on which an artist fastens a piece of canvas. They are also used for small-scale embroidery to provide steady tension, affixing the edges of the fabric with push-pins or a staple gun before beginning to sew, and then removing it from the stretcher when the work is complete. Stretchers are usually in the shape of a rectangle, although shaped canvases are also possible.
==Construction==
Since a stretcher is simply a frame, it can be constructed in a variety of ways. The differences in construction have to do with how the corners are built. Commercially available pre-fabricated stretchers come in segments with interlocking corners, that can be fit together like puzzle pieces. Corner supports can also be made using simple woodworking techniques, however.
In the case of the French stretcher, a mitre joint is used to adhere the corners. "Keys" or small triangle wedges are inserted in the joint after stretching the canvas to give the canvas its final tension. When fastening the canvas, pressure should be distributed evenly around the stretcher to minimize warping due to unequal distribution of pull. Unlike other types of stretchers, the corner joints in French stretchers are not glued or fastened in any permanent way. This allows the canvas to be re-tensioned later, as it has a natural tendency to stretch and sag over time. In contrast, strainer bars stretch canvas in a fixed (non-adjustable) way.
A simpler form of stretcher employs butt joints to adhere the corners. The joint is pinned and glued into place and can not be expanded after assembly.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Stretcher bar」の詳細全文を読む



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