Door closure system
First Claim
1. A door structure, said door structure comprising a door selectively movable between open and closed conditions;
- a frame formed from spaced side members; and
a top member which, in combination with a floor, define the opening in which the door is positioned, the door when closed, formed by a first wall forming an external surface at a first side of the opening and a second, spaced wall defining an external surface to the second side of the opening, said first and second walls defining a cavity between the same which extends substantially across the area of the opening and air movement means are provided to cause the movement of air into and through the said cavity and wherein the air is introduced into the cavity from a port located on one of the side members of the door frame and towards the lower edge of the door when the door is closed.
1 Assignment
0 Petitions
Accused Products
Abstract
A door structure, said structure for use particularly, although not necessarily exclusively, to selectively close an opening between a first environment which is at a temperature which is lower than the temperature of the environment on the opposing side of the opening. The door is provided with a structure so as to define a cavity-therein into which air is caused to flow. The door has formations and a structure so as to encourage uniform air flow through the cavity and hence prevent or minimise the creation of condensation and/or frost on the door structure.
97 Citations
19 Claims
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1. A door structure, said door structure comprising a door selectively movable between open and closed conditions;
- a frame formed from spaced side members; and
a top member which, in combination with a floor, define the opening in which the door is positioned, the door when closed, formed by a first wall forming an external surface at a first side of the opening and a second, spaced wall defining an external surface to the second side of the opening, said first and second walls defining a cavity between the same which extends substantially across the area of the opening and air movement means are provided to cause the movement of air into and through the said cavity and wherein the air is introduced into the cavity from a port located on one of the side members of the door frame and towards the lower edge of the door when the door is closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- a frame formed from spaced side members; and
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17. A door comprising:
- a first and second wall held in a spaced configuration so as to define a cavity therebetween, said first and second walls formed of a flexible material to allow the same to be selectively rolled and unrolled to move the door between open and closed conditions, said door having a lower edge formed by a plate joining the lower edges of the first and second walls and wherein spaced inwardly of the plate there is provided a perforated or porous layer, said layer and plate forming a channel or passage into which a fluid is supplied prior to passing through the perforated or porous layer and into the cavity.
- View Dependent Claims (18, 19)
Specification