Insert means for forming voids in concrete and method of applyin

Details Insert means for forming voids in concrete and method of applyin Insert means for forming voids in concrete and method of applyin

1983-11-17

1985-05-07

Dixson, Jr., William T.

Special receptacle or package

Structural features for nesting identical receptacles or...

Having defined means to limit extent of nesting

206627, 249175, 249183, 264542, 425542, 52704, B65D 8562, B65D 2102, B28B 728

Patent

active

045152713

ABSTRACT:
Insert means for forming a void in poured concrete comprises a tubular structure formed of sheet material closed at upper and lower ends by means of an upper closure element and a lower closure element, respectively. The inner surface of the tubular structure presents a helical line of scoring extending between the bottom of the tubular structure and the upper closure element. The upper closure element is formed integrally with the tubular sheet material and constructed at an upper side thereof with holder tab means for handling the insert means and especially for lifting the upper closure element and the pulling away of the tubular structure along the line of scoring to leave a void. The tubular structure is characterized by a tapered configuration which decreases in size from the bottom to the top thereof. As a result of this tapered construction a plurality of the tubular inserts may be arranged in nested relationship and the holder tab means is operable to maintain upper closure elements of the nested inserts spaced away from one another.

REFERENCES:
patent: 1406577 (1922-02-01), Murray
patent: 1481807 (1924-01-01), Murray
patent: 1954788 (1934-04-01), Chambliss, Jr. et al.
patent: 2132966 (1938-10-01), O'Brien
patent: 2639873 (1953-05-01), Smith
patent: 3020615 (1962-02-01), Peters
patent: 3205634 (1965-09-01), Wagner
patent: 3265349 (1966-08-01), Hamrick
patent: 3346230 (1967-10-01), Tolf, Jr.
patent: 3933336 (1976-01-01), Tolf, Jr.
Post Sleeves for Railings, R. & B. Wagner, Inc., Milwaukee, Wisconsin, 53207, Oct. 1981, p. 102.

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