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US 6,021,627 AGranted
Manufacture of pocketed compound nested coil springs
AssigneeL&P Property Management Company
InventorsNiels S. Mossbeck, Thomas J. Wells, Simon Paul Spinks
Life of this patent
Estimating the term…
Abstract
A system and method for manufacturing pocketed compound nested coil springs includes inserting a compressed, preferably pocketed, smaller coil spring into a horizontally oriented larger coil spring either prior to compressing and inserting the outer coil spring into pocket material or after the larger coil spring has been pocketed thereby requiring the first spring to be inserted into and through an opening in the pocket material.
Claims17
A method of forming a string of pocketed compound nested coil springs, the method comprising the steps of:
- forming a plurality of individual first coil springs each of a first uncompressed height and having a longitudinal axis;
- orienting each of the first coil springs with its longitudinal axis in a generally horizontal attitude;
- compressing each of the first coil springs;
- forming a plurality of individual second coil springs each of a second uncompressed height which is greater than the first uncompressed height of the first coil springs, each of the second coil springs having a longitudinal axis and a plurality of normally spaced coils;
- orienting each of the second coil springs with its longitudinal axis in a generally horizontal attitude;
- inserting each of the compressed first coil springs between adjacent spaced coils of one of the second coil springs and thereby nesting each of the first coil springs within one of the second coil springs;
- compressing each of the second coil springs;
- orienting each of the compressed second coil springs with its longitudinal axis in a generally vertical attitude;
- folding an elongate sheet of fabric about a longitudinal fold line into two plies of fabric joined by the longitudinal fold line;
- inserting each of the compressed second coil springs between the plies of the folded fabric;
- and
- forming an individual pocket in the fabric around each of the second coil springs.
9 more elements
A method of forming a string of pocketed compound nested coil springs, the method comprising the steps of:
- forming a plurality of individual first coil springs each of a first uncompressed height and having a longitudinal axis;
- forming an individual fabric pocket around each of the first coil springs;
- compressing each of the pocketed first coil springs;
- forming a plurality of individual second coil springs each of a second uncompressed height which is greater than the first uncompressed height of the first coil springs, each of the second coil springs having a longitudinal axis and a plurality of normally spaced coils;
- orienting each of the second coil springs with its longitudinal axis in a generally horizontal attitude;
- inserting each of the compressed and pocketed first coil springs between adjacent spaced coils of one of the second coil springs and thereby nesting each of the first coil springs within one of the second coil springs to produce a compound nested spring unit;
- compressing each of the compound nested spring units;
- orienting each of the compound nested spring units with its longitudinal axis in a generally vertical attitude;
- folding an elongate sheet of fabric about a longitudinal fold line into two plies of fabric joined by the longitudinal fold line;
- inserting each of the compound nested spring units between the plies of the folded fabric;
- and
- forming an individual pocket in the fabric around each of compound nested spring units.
9 more elements
A method of forming a string of pocketed compound nested coil springs, the method comprising the steps of:
- forming a plurality of individual first coil springs each of a first uncompressed height and having a longitudinal axis;
- forming an individual fabric pocket around each of the first coil springs;
- compressing each of the pocketed first coil springs;
- forming a plurality of individual second coil springs each of a second uncompressed height which is greater than the first uncompressed height of the first coil springs, each of the second coil springs having a longitudinal axis and a plurality of normally spaced coils;
- orienting each of the second coil springs with its longitudinal axis in a generally horizontal attitude;
- compressing each of the second coil springs;
- orienting each of the compressed second coil springs with its longitudinal axis in a generally vertical attitude;
- folding an elongate sheet of fabric about a longitudinal fold line into two plies of fabric joined by the longitudinal fold line;
- inserting each of the compressed second coil springs between the plies of the folded fabric;
- forming an individual pocket in the fabric around each of the compressed second coil springs;
- expanding each of the second coil springs;
- inserting one of the compressed and pocketed first coil springs into an opening in the fabric of the pocket around each of the second coil springs, the compressed and pocketed first coil springs being inserted between adjacent spaced coils of one of the second coil springs and thereby nesting one of the first coil springs within each of the second coil springs.
9 more elements
Dependencies are inferred from the claim text.