Abstract A wire core structure for sandwich material including a plurality of planar wire core ribbons which are formed of wire bent at right angles to form anchor sections on opposite sides of the core to engage the face sheets of the sandwich material-said core anchor sections being joined by joinder sections which extend at a right angle to the plane of the core structure. A notch is provided on the outside of some anchor sections to receive a cross wire extending in the plane of said core structure at a right angle to said core ribbons. Such notches are related to the diameter of said cross wires so that the cross wires will project slightly beyond the notch into which is received the cross wire, which spacing provides space for an adhesive, and yet, the cross wires may be deformed enough in welding to make the outer side of the cross wires generally flush with the outer sides of the anchor sections. In one embodiment there is a core ribbon which is serpentine and in one embodiment the ribbons are used in pairs which are offset to form a series of closed sections and a series of downwardly open sections and a series of upwardly open sections with a series of cross wires being received into said last mentioned downwardly open and upwardly open sections.
The core structure set forth in claim 1 wherein: said first one of said cross wires is in line with but spaced above said last mentioned lower anchor section.
Claim 2
Dependent Claim
95 words
The core structure set forth in claim 1 wherein said first one of said cross wires is shaped like said core ribbons and has upper and lower anchor sections extending generally in plane of the core structure with a spacer section joining each adjacent pair of upper and lower anchor sections, and each upper anchor section of said last mentioned cross wire is connected to an upper anchor section of a core ribbon and each lower anchor section of said last mentioned cross wire is connected to a lower anchor section of a core ribbon.
Claim 3
Dependent Claim
377 words
A core structure of predetermined thickness adapted to be placed between two face sheets to form sandwich material, said core structure defining a horizontal plane and comprising: a set of first core ribbons extending generally parallel to each other in a first direction, each of said first core ribbons having alternating upper and lower anchor sections extending generally parallel to said plane with a spacer section joining each adjacent upper and lower anchor section, each of said first core ribbons defining a vertical plane, at least some of said spacer sections on at least some of said ribbons extending at substantially a right angle to said plane of said core material; a set of second core ribbons extending parallel to each other and to said first core ribbons, core ribbons of said second core ribbons being spaced alternately between adjacent ones of said first core ribbons, said second core ribbons having alternately upper and lower anchor sections joined by spacer sections, said anchor sections and spacer sections of said second core ribbons being substantially the same as said first core ribbons, said second core ribbons being offset from said first ribbons such that the upper anchor sections of two adjacent ones of said first ribbons will be in the same vertical plane with a lower anchor section of a second core ribbon which is located between said last mentioned two first core ribbons; and a set of cross wires extending parallel to each other generally in the plane of said core material and being at a substantial angle to said first and second core ribbons, said cross wires being rigidly connected to said core ribbons at said anchor sections so as to stabilize said core ribbons relative to each other, at least some of said cross wires being shaped like said core ribbons and having upper and lower anchor sections extending generally in the plane of the core structure with a spacer section joining each adjacent pair of upper and lower anchor sections, and each upper anchor section of said last mentioned cross wires is connected to an upper anchor section of a core ribbon and each lower anchor section of said last mentioned cross wires is connected to a lower anchor section of a core ribbon.
Claim 4
Dependent Claim
35 words
The core structure set forth in claim 4 wherein at least some of said anchor sections are connected together by a weld of the material of which the core ribbons and croSs wires are made.