# US 2013/0239484 A1 · Door for a Refrigerated Cabinet

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- Number: US 2013/0239484 A1
- Document ID: US20130239484A1
- Status: Published application
- Kind: A1
- Application number: 13/792,864
- Filed: 2013-03-11
- Published: 2013-09-19
- Earliest claimed: 2012-03-14
- Assignees: Thermoseal Industries, LLC
- Inventors: Richard Chubb; Ralph Wearsch
- Web page: https://patentgrep.com/patent/US20130239484A1

## CPC

- F25D 23/02: Doors; Covers (F25D23/08 takes precedence {locks or fastenings E05B65/0042})
- A47F 3/043: {Doors, covers (A47F3/0434 takes precedence)}
- E06B 3/6617: {one of the panes being larger than another}
- E06B 7/16: Sealing arrangements on wings or parts co-operating with the wings ({specially adapted for fireproof or similar closures E06B5/164; } E06B7/098 takes precedence {; fixed sealing joints E04B1/68; devices for fitting sealing strips E04F21/00})
- F25D 21/04: Preventing the formation of frost or condensate
- F25D 23/028: {Details}
- F25D 23/087: {Sealing strips}
- E06B 3/26341: {comprising only one metal frame member combined with an insulating frame member}
- F25D 2201/00: Insulation
- F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B)
- A47F: SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)

## Abstract

The door is made with a multi-lite insulated glass unit and a frame of aluminum rails. The insulated glass unit has a stepped cross-section with the outer glass lite being larger than the inner glass lites. An opaque non-conductive ceramic frit forms a rectangularly shaped border to mask the mounting of the inner glass lite(s). An electrically conductive coating on the outer glass lite is insulated from the aluminum rails of the frame by a plastic strip disposed between the outer glass lite and each rail.

## Claims

### Claim 1

A door comprising
an insulating glass unit having an outer glass lite of predetermined rectangular shape and an inner glass lite of smaller rectangular shape than said outer glass lite;
a pair of horizontally disposed aluminum rails, each said rail having a base, a pair of parallel walls extending perpendicularly of said base and a flange extending from said base in parallel to said pair of walls and defining a recess with one of said walls receiving an edge of said outer glass lite in sealed relation therein;
a pair of vertically disposed rails connected to and across said pair of horizontally disposed rails to define a frame, each said vertically disposed rail having a base, a pair of parallel walls extending perpendicularly of said base and a flange extending from said base in parallel to said pair of walls and defining a recess with one of said walls receiving an edge of said outer glass lite in sealed relation therein; and
a plurality of breakers, each said breaker being snap-fitted onto a respective one of said pair of horizontally disposed rails and a respective one of said pair of vertically disposed rails, each said breaker having an end disposed in abutment with said inner glass lite.

### Claim 2 (depends on 1)

A door as set forth in claim 1 wherein said inner glass lite is sealing secured to said outer glass lite in spaced parallel relation to define a space therebetween.

### Claim 3 (depends on 2)

A door as set forth in claim 2 wherein each horizontally disposed rail has a third wall transverse to one of said pair of parallel walls and extending into the plane of said inner glass lite and an abutment extending from said third wall and abutting said inner glass lite and each vertically disposed rail has a third wall transverse to one of said pair of parallel walls and extending into the plane of said inner glass lite and an abutment extending from said third wall and abutting said inner glass lite.

### Claim 4 (depends on 3)

A door as set forth in claim 3 wherein said third wall of each of said pair of vertically disposed rails extends between and is secured to each wall of said pair of parallel walls thereof to define a closed space of rectangular cross-section.

### Claim 5 (depends on 3)

A door as set forth in claim 3 wherein said third wall of each of said pair of horizontally disposed rails is spaced from the other of said pair of horizontally disposed rails.

### Claim 6 (depends on 1)

A door as set forth in claim 1 further comprising a plurality of gaskets, each said gasket having a dart thereon and wherein each said breaker is of skeletal structure including a C-shaped recess having a constricted mouth receiving said dart of a respective gasket in press-fit relation.

### Claim 7 (depends on 1)

A door as set forth in claim 1 further comprising an opaque rectangularly shaped border on said outer glass lite, said border extending inwardly of said inner glass lite.

### Claim 8 (depends on 7)

A door as set forth in claim 7 wherein said border is a ceramic frit.

### Claim 9

A door comprising
an insulating glass unit having an outer glass lite of predetermined rectangular shape and an inner glass lite of smaller rectangular shape than said outer glass lite sealing secured to said outer glass lite in spaced parallel relation to define a space therebetween;
a pair of horizontally disposed rails, each said rail having a base, a pair of parallel walls extending perpendicularly of said base, a third wall transverse to one of said pair of parallel walls and extending into the plane of said inner glass lite, an abutment extending from said third wall and abutting said inner glass lite, a flange extending from said base in parallel to said pair of walls and defining a recess with one of said walls receiving an edge of said outer glass lite in sealed relation therein; and
a pair of vertically disposed rails connected to and across said pair of horizontally disposed rails to define a frame, each said vertically disposed rail having a base, a pair of parallel walls extending perpendicularly of said base, a third wall transverse to one of said pair of parallel walls thereof, an abutment extending from said third wall and abutting said inner glass lite, a flange extending from said base in parallel to said pair of walls and defining a recess with one of said walls receiving an edge of said outer glass lite in sealed relation therein.

### Claim 10 (depends on 9)

A door as set forth in claim 9 further comprising a plurality of breakers, each said breaker being snap-fitted onto said abutment of a respective one of said pair of horizontally disposed rails and a respective one of said pair of vertically disposed rails, and a plurality of gaskets, each said gasket being snap-fitted into a respective one of said breakers on a side of said insulated glass unit opposite said outer glass lite.

### Claim 11 (depends on 10)

A door as set forth in claim 10 wherein each said breaker is of skeletal structure including a C-shaped cup-shaped recess having a constricted mouth and each said gasket has a dart on one side press-fitted into said recess of a respective breaker.

### Claim 12 (depends on 10)

A door as set forth in claim 10 wherein one of said breakers fitted into one of said pair of vertically disposed rails has a bifurcated end defining a vertically disposed slot and wherein said door further comprises a gasket slidably mounted in and projecting from said slot.

### Claim 13 (depends on 10)

A door as set forth in claim 10 further comprising a heater wire mounted on said abutment of each of a respective one of said pair of horizontally disposed rails and a respective one of said pair of vertically disposed rails on an opposite side from said inner glass lite.

### Claim 14 (depends on 9)

A door as set forth in claim 9 wherein said third wall of each of said pair of vertically disposed rails extends between and is secured to each wall of said pair of parallel walls thereof to define a closed space of rectangular cross-section.

### Claim 15

A door for a refrigerated cabinet comprising
an insulating glass unit having an outer glass lite of predetermined rectangular shape with an electrically conductive coating thereon, an inner glass lite of smaller rectangular shape than said outer glass lite and an intermediate glass lite disposed in spaced relation between said outer glass lite and said inner glass lite;
a plurality of aluminum rails defining a frame about said insulated glass unit, each said rail having a base, a pair of parallel walls extending perpendicularly of said base and a flange extending from said base in parallel to said pair of walls and defining a recess with one of said walls receiving an edge of said outer glass lite in sealed relation therein; and
a plurality of plastic strips, each said plastic strip being disposed between said outer glass lite and one of said pair of parallel walls of a respective rail to electrically insulate said electrically conductive coating on said outer glass lite from said one of said pair of parallel walls of said respective rail.

### Claim 16 (depends on 15)

A door as set forth in claim 15 wherein each said plastic strip is of Z-shaped cross-section having a web disposed in parallel against said outer glass lite, a first flange disposed over an outer edge of said outer glass lite and a second flange disposed over a respective rail.

### Claim 17 (depends on 16)

A door as set forth in claim 16 wherein said web of each said plastic strip has a corrugated surface facing said outer glass lite for receiving a glue for bonding said web to said outer glass lite and a corrugated surface facing said respective rail.

### Claim 18 (depends on 15)

A door as set forth in claim 15 further comprising a plurality of plastic breakers, each said breaker being snap-fitted onto a respective one of said rails and having an end disposed in abutment with said inner glass lite.

### Claim 19 (depends on 18)

A door as set forth in claim 18 further comprising a plurality of gaskets, each said gasket having a grommet thereon and wherein each said breaker is of skeletal structure including a cup-shaped recess having a constricted mouth receiving said grommet of a respective gasket in snap-fit relation.

### Claim 20 (depends on 15)

A door as set forth in claim 15 wherein each said rail includes a third wall extending from one of said pair of walls towards the other of said pair of walls and a fourth wall extending from said other of said pair of walls towards said third wall to define a gap therebetween and imparting a C-shaped cross-section to said rail.

### Claim 21 (depends on 20)

A door as set forth in claim 20 further comprising a plurality of plastic covers, each said cover being fitted onto said third wall and said fourth wall of a respective rail to close said gap therebetween.

### Claim 22 (depends on 21)

A door as set forth in claim 21 wherein each said cover has a corrugated surface facing said intermediate glass lite of said insulated glass unit.

### Claim 23 (depends on 15)

A door as set forth in claim 15 further comprising an opaque non-conductive rectangularly shaped border on an inside surface of said outer glass lite facing said intermediate glass lite, an electrically conductive bus bar disposed along an upper edge of said inside surface of said outer glass lite and an electrically conductive bus bar disposed along a lower edge of said inside surface of said outer glass lite.

### Claim 24 (depends on 15)

A door as set forth in claim 15 wherein each said rail includes a C-shaped boss mounted on and extending from one of said walls of said pair of parallel walls for receiving a heater wire therein.