Abstract: The chair according to the invention comprises a seat element with subjacent strengthening ribs, integral with four legs, a backrest and possibly armrests, said seat element further comprising:in the median zone of its lower face and up to the vicinity of the rounded part joining with its backrest, a projecting extension of the rear rib extending in a slope for stacking,and in its upper face an opening adapted to receive the projecting element of the chair or chairs stacked thereabove,the lowermost part of said projecting element being remote from the seat element by a sufficient distance for the mould to be able to be equipped, beneath the impression defining the said rounded joining part, with a passage for a hot injection nozzle and cooling conduits.

Abstract: This invention relates to a monolithic armchair made of injected plastics material, stackable with small pitch and comprising various elements constituted by a seat element with subjacent reinforcing projections, a backrest, four legs and armrests, said elements presenting substantially horizontal parts and substantially vertical parts, the latter being inclined, forming between their line of greatest slope and the vertical, a so-called stacking angle (a), wherein the stacking angle (a) is included between 8.degree. and 15.degree. in order to reduce the pitch of stacking, join of the legs with the seat element, the armrests and the backrest being effected by reinforced fit and stiffening means included within this limited pitch.

Abstract: A chair having assemblable components wherein the seat and back have locking studs of irregular configuration which are selectively receivable within profiled openings in the sides of the chair when the back and seat are in first position and which are locked within the openings as the seat and back are rotated to a proper use position and wherein the seat includes outwardly extending lugs which are cooperatively received in bearings formed in the sides of the chair when the seat is moved to a use position.

Abstract: This invention relates to a foldable armchair incorporating adjustable backrest and footrest, in which the connecting elements which control orientation of the footrest are connected to the backrest by pivoting crank pins provided with bearing faces cooperating with stops on said backrest, so as to make a unidirectional angular connection which ensures modification of the orientation of the footrest during any angular modification of the backrest, while allowing the armchair to be completely folded.

Abstract: A chair has a seating surface supported by two, laterally-spaced leg members extending above the seating surface to receive arm rests, a back rest mounted for pivoting at its base on a back end of said seating surface, and the arm rests mounted for pivoting on the back rest. Leg pairs of each leg member converge upwardly and are rigidly joined by a head brace, so as to be stackable. Arm rests, which respectively rest on the head braces, are dismountably secured thereto. A rear end of each arm rest is joined to the back rest via a pivot pin situated above the level of the arm rest when on the head brace, at such a distance from a pivot pin mounting the back rest to the seating surface that the rear end of said arm rest can move beyond the opposite front end of the brace, when the back rest is folded down on, i.e. pivoted to, the seating surface.