Air heated, flexible door panel
First Claim
1. An apparatus for closing at least a portion of a doorway opening in a wall between a cold space on one side of the wall and a warm space on the other side of the wall, the apparatus comprising:
- a front resilient layer;
a back resilient layer;
a central insulating layer comprising a plurality of rigid insulating pieces aligned in tile pattern sandwiched between the front and back resilient foam layers;
a resilient sheet covering the front and back resilient layers and interposed central insulating layer, forming a resilient insulating panel; and
a roller structure attached to the resilient insulating panel.
1 Assignment
0 Petitions
Accused Products
Abstract
A door system for a cold storage locker that includes resilient door panels that flex and have increased resistance to damage when hit by a forklift. A high degree of insulation is achieved by the choice and thickness of the resilient foams therein. Also, the resilient door panels are magnetically attracted to a gasket seal on a doorframe to provide an affirmative seal. Active magnetic control may enhance the attraction or repulsion of the door panel. Frost control is realized by warming air from the cold storage locker and passing it through air channels in the door panel proximate to the gasket seal and down an astragal interface between door panels. Door panels of laminate, bagged poured foam formation, and self-skinning foam formation further reduce the cost of manufacture and shipping.
68 Citations
18 Claims
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1. An apparatus for closing at least a portion of a doorway opening in a wall between a cold space on one side of the wall and a warm space on the other side of the wall, the apparatus comprising:
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a front resilient layer;
a back resilient layer;
a central insulating layer comprising a plurality of rigid insulating pieces aligned in tile pattern sandwiched between the front and back resilient foam layers;
a resilient sheet covering the front and back resilient layers and interposed central insulating layer, forming a resilient insulating panel; and
a roller structure attached to the resilient insulating panel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An automated door system, comprising:
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a doorframe defining an entrance;
a door track mounted across a top portion of the doorframe;
a door panel movably and vertically supported by the door track and comprised of a resilient material for being able to recover from an impact and movable to contact the doorframe and to obstruct at least a portion of the entrance when in a closed position;
a door position sensor operable to sense the door panel in a closed position with a periphery of the door panel registered to the doorframe; and
a door positioning system operably configured to position the door panel to the closed position and to reset the door panel to an open position in response to the door position sensor sensing the door panel no longer being registered to the doorframe indicating impact. - View Dependent Claims (14, 15, 16, 17)
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18. A door system, comprising:
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a door frame defining an entrance and having a sealing surface and having a recess approaching a trailing edge of the sealing surface;
a door track mounted across a top portion of the door frame;
a door panel supported by the door track for movement between an open position and a closed position with the sealing surface of the door frame; and
a trailing edge guide including a horizontal flange attached to a trailing edge side casing extending horizontally proximate to a floor having an outward upwardly turned surface;
a wedge surface inwardly directed from the outward upwardly turned surface of the trailing edge guide; and
an outward and aft angled bracket attached to a trailing surface of the door panel positioned to engage the wedge surface as the door panel approaches full closing travel to urge the door panel into sealing contact with the door frame.
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Specification