Patent ID: 6073996
Filing Date: 2000-06-13
Classification: B60N,Y10T

Abstract:
A method for forming a structure of seat back with an armrest in which an armrest storage portion is defined for allowing the armrest to be stored therein, said method comprising the steps of:providing a foaming die means including die surfaces conforming to a predetermined configuration of said seat back, said die surfaces having a protuberant die surface part, wherein said protuberant die surface part has at least two sloped die surfaces each of which slope in a single respective plane in a direction toward each other as extended to a top of the protuberant die surface;injecting a liquid base foaming material into said foaming die means;curing said liquid base foaming material along said die surfaces of said foaming die means to form a foam padding in said predetermined configuration of seat back, so that a recessed portion is defined in one side of said foam padding along said protuberant die surface part in such a manner as to form a first two sloped walls each in a single respective plane in said recessed portion of said foam padding, so that the recessed portion opens outwardly in a constant divergent fashion;thereafter, taking out said foam padding from said foaming die means;providing a covering material;providing stamping means for adhesively engaging said cover material to said foam padding;said stamping means including stamping die surfaces conforming to said predetermined configuration of seat back, said stamping die surfaces having a protuberant die surface part,wherein said protuberant die surface part generally conforms to said recessed portion of said foam padding and has at least two sloped die surfaces each corresponding respectively to said first two sloped walls;setting said foam padding and said covering material in said stamping means with an adhesive included between said covering material and said foam padding;operating said stamping means to press the stamping die surface thereof against said covering material, thereby causing said covering material to be adhered by said adhesive on and along said recessed portion and other surfaces of said foam padding, so as to form an adhered work of said covering material and foam padding which has an armrest storage portion with at least a second two sloped walls each in a single respective plane defined therein, said second two sloped walls comprising a first sloped wall with which a free end portion of said armrest is to be frictionally contacted and a second sloped wall with which a base end portion of said armrest is frictionally contacted;removing said stamping die surface from said adhered works, the covering material and foam padding;taking out said adhered work from each stamping means; andattaching a seat back frame and a bracket into said adhered work, while securing the armrest rotatably by said bracket in said armrest storage portion, whereby a structure of said back is formed, in which the armrest storage portion opens outwardly in a constant divergent fashion, allowing the armrest to be retained frictionally therein and released therefrom.