Metal working – Method of mechanical manufacture – Obtaining plural product pieces from unitary workpiece
Patent
1979-08-22
1981-09-15
Anderson, Philip
Metal working
Method of mechanical manufacture
Obtaining plural product pieces from unitary workpiece
5481, 29 911, 264 464, 264 465, 264 467, 264157, B29D 2704, B23P 1700
Patent
active
042889030
ABSTRACT:
A method for producing stuffing for a spring-type mattress, including the steps of forming grooves on the whole circumference of edge portions of upper and lower mold members, fixing dense and sparse seats on flat surfaces of the upper and lower mold members, respectively, bending whole edge portions of both seats into the grooves, inserting and fixing elastic plates into the grooves, pouring a certain predetermined quantity of an undiluted solution of foaming plastics onto the flat surface of the lower mold member and tight contacting both mold member before forming the undiluted solution, horizontally and symmetrically cutting and dividing the stuffing into two parts, turning over the two parts and assembling them so as to cover a spring assembly thereonto thereby covering the two parts by an outer decorative member as a mattress unit.
REFERENCES:
patent: 3116196 (1963-12-01), Terry
patent: 3239584 (1966-03-01), Terry et al.
patent: 3366026 (1968-01-01), Herr et al.
patent: 3459611 (1969-08-01), Joseph et al.
patent: 3906560 (1975-09-01), Bulloch
patent: 3942926 (1976-03-01), Bulloch
Matsuda Tamio
Tanikawa Sakuichi
Aisin Seiki Kabushiki Kaisha
Anderson Philip
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