I took me some effort to keep the survey over all the different tube segments I welded together for the production of the first eight stream chairs. But all parts fitted perfectly, thanks to the brave bar benders of Fa. Schuster Co. In the background you can see a first pre-assembled chair. In the foreground you can see first weldseams which you will not recover on a finished chair.
To achieve the stream chairs uniformity I assemble its several parts in a universal positioning device. The concruence of the chairs is provided by a grid, and in abstract terms this grid is the least common constructive denominator of the chairs. In the trestle you can see on the picture all parts that have identical positions in all different stream chairs are positioned. To facilitate my welding I clamp all parts to achieve tight fits and perfect seems.
Crucial for an invisible weldseam is a perfect congruence. I achieve such a perfect fit by pressing the bars ends into two prisms simultaneously. Here it is amazing how much better the fingers feel an excessing projection as the eyes can see it. Finally when my fingers "say" that the fit is satisfactory I come to welding and - believe it or not - this is the point when say I love to work:
The welding process is an unexpected smooth operation - you may even call it ruminant or meditative. You try to move smooth and continuous and watch the melting metall. Yet the melting of the solid is a continuous process. That means you don't have just the discrete states "fluid" and "solid", but all in between. Like when you drive your bike at a certain point you stop thinking about that - you just watch how you channel the seam by mastering the ductile.
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Max Longin is a German mathematician living and working in northern Denmark. He designed the float bed in 2004 and the stream chair in 2006. A blow-by-blow presentation of his products can be found on his website at www.max-longin.com. Feel free to contact him.