Patent ID: 8523438

Claim:
A closure assembly that includes two complementary elements ( 200 ), ( 250 ) that are configured to be successively joined and separated, and a slider ( 100 ) that includes a base ( 110 ), two lateral walls ( 120 , 130 ), a low central ridge ( 140 ) extending from the base ( 110 ) parallel to the two lateral walls ( 120 , 130 ), wherein the low central ridge ( 40 ) comprises a soleplate ( 142 ) that extends transversally from a free end of the low central ridge ( 140 ), wherein at least one of the two elements ( 250 ) has a rib ( 300 ) that extends transversally to the at least one of the two elements ( 250 ) from an internal face ( 252 ) of a backing strip ( 254 ) of said at least one of the two elements ( 250 ) towards the second of the two elements, wherein said rib ( 300 ) and is adjacent to the soleplate ( 142 ) and comprises a tapered end configured to press against the soleplate ( 142 ) under the effect of a pulling force on the slider, so that when the tapered end of the rib ( 300 ) is pressed against the soleplate due to the pulling force on the slider, the backing strip that bears the at least one element ( 250 ) which comprises the rib ( 300 ) on its inside surface tends to be flattened against the associated lateral wall ( 130 ) of the slider and prevents withdrawal of the slider from the at least one of the two complementary elements ( 250 ), wherein both of the complementary elements ( 200 ) and ( 250 ) extend between the base and the soleplate, the rib extends beneath at least one of the two complementary elements ( 250 ) between said at least one complementary element ( 250 ) and the soleplate ( 142 ), and the portion of the soleplate ( 142 ) which extends in the area of an upper surface ( 1420 ) against which the rib ( 300 ) comes into abutment is smaller than the portion of the soleplate which is adjacent to said at least one complementary element ( 200 ).