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US 9,126,821 B2Granted
Glueless pocketed spring unit construction
OwnerMartin Wolfsoninventor
Life of this patent
Estimating the term…
Abstract
Methods and systems for no-glue pocketed spring unit construction. Rows of pocketed springs, preferably arranged into modules of more than two pocketed springs surrounding a central hole, are ultrasonically welded together when paired vibrating probes and anvils press layers of pocketed spring fabric from the rows of pocketed springs together and a welding pulse is transmitted to the vibrating probe.
Claims18
A method for glueless assembly of extended area cushioning units, comprising the steps of repeatedly:
- loading first and second rows of pocketed springs onto first and second rows, respectively, of locator pins;
- wherein individual ones of said pocketed springs each comprise a coil spring in a pocket made of a flexible material;
- welding said first and second rows of pocketed springs together, with a relative alignment determined by said first and second rows of locator pins;
- loading said first row of pocketed springs onto said second row of locator pins, and loading an additional row of pocketed springs onto said first row of locator pins;
- and
- repeating said welding step to weld said first row of pocketed springs together with said additional row of pocketed springs.
3 more elements
A method of assembling an extended area cushioning structure comprising:
- (a) pocketing a plurality of coil springs inside a flexible material, at least some individual ones of said coil springs being located in separate pockets which are separated from each other and formed into linear connected rows of pocketed coil springs by welds in said flexible material;
- (b) welding together pairs of said linear connected rows of pocketed coil springs to form linear connected rows of modules;
- wherein individual ones of said modules comprise more than two pocketed springs which together surround an opening;
- and
- (c) repeatedly welding together pairs of said linear connected rows of modules to thereby form a cushioning support structure having an extended area, in which adjacent modules are welded together in both length and width directions of the cushioning support structure;
- (d) wherein individual ones of said pocketed coil springs are joined together, in the center of said support structure, by polymer welds, and not by glue.
3 more elements
Dependencies are inferred from the claim text.