Collapsible support structures

Supports – Easel; book – copy or music score holder – Folded blank

Patent

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Details

248460, F21K 221

Patent

active

043185274

ABSTRACT:
The invention relates to improvements in lightweight collapsible support structures in the nature of easels, book rests and the like which are self sustaining in a predetermined fully erected configuration, presenting in the fully erected configuration a multiplicity of forwardly facing panels upstanding in a rearwardly inclined or substantially vertical position to provide support surfaces for the displaying, supporting or anchoring of articles such as pads, books or the like and further presenting forwardly extending ledge portions from the bottom edges of such abutment surfaces, said ledges serving to rigidify and stabilize the erect configuration of these structures against collapse, but so adapted as to be foldable into a position allowing for such structures to be compactly folded up and collapsed for storage or for carrying when not in use.

REFERENCES:
patent: 790066 (1905-05-01), Lichter
patent: 844066 (1907-02-01), Warren
patent: 1515508 (1924-11-01), Medick
patent: 1652326 (1927-12-01), Pollock
patent: 2587316 (1952-02-01), Henry
patent: 3269043 (1966-08-01), Swanson
patent: 3990669 (1976-11-01), Smith
patent: 4002237 (1977-01-01), Nichols

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