← Back to Patent Explorer
US4759466A Expired / Lapsed US ⏱️ 0.0 years remaining

EMI seam for enclosures

Assignee: Apple Inc
•
Filing: 1987-10-06
•
Granted: 1988-07-26
•
Expires: 2007-10-06
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An enclosure having an improved seam for inhibiting passage of electromagnetic radiation through the enclosure is described. The enclosure having a housing and a removable cover are joined at its respective edges. A plurality of spaced-apart tabs extend from an edge and slideably engage a plurality of slots which are formed on an interior surface adjacent to a corresponding mating edge. A domed projection on each tab slides into recessed cavities located on each slot to form a tight mechanical connection. The enclosure has a metal-coated interior surface and mating surface, wherein the tabs and slots operate to electrically couple the cover to the housing.

Inventors

  • 👤 Steven B. Chase
  • 👤 Roy J. Askeland

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 14:39
CPC Classifications
H; H05; H05K; H05K5/00; H05K5/10; H05K5/15; H05K9/00; H05K9/0073

Claims Analysis

Total Claims: 28
Claim 1
Independent Claim 146 words
An enclosure for inhibiting passage of electromagnetic radiation comprising: a first housing member having a coating which inhibits passage of electromagnetic radiation; a second housing member having a coating which inhibits passage of electromagnetic radiation; coupling means for joining said two housing members, said coupling means comprised of a plurality of extended tabs disposed on said first housing member and said second housing member having a plurality of slots for accepting said tabs, each tab fitting into a corresponding slot to form a tab-slot mating pair, wherein each of said tab-slot mating pairs includes a raised dome on one of said tab-slot mating pair and a recessed cavity on other of said corresponding tab-slot mating pair, such that said raised dome slideably engages with said recessed cavity; said coupling means providing an effective seam when said two housing members are joined; whereby said enclosure is formed.
Claim 2
Dependent Claim 146 words
An enclosure for inhibiting passage of electromagnetic radiation comprising: a first housing member having a coating which inhibits passage of electromagnetic radiation; a second housing member having a coating which inhibits passage of electromagnetic radiation; coupling means for joining said two housing members, said coupling means comprised of a plurality of extended tabs disposed on said first housing member and said second housing member having a plurality of slots for accepting said tabs, each tab fitting into a corresponding slot to form a tab-slot mating pair, wherein each of said tab-slot mating pairs includes a raised dome on one of said tab-slot mating pair and a recessed cavity on other of said corresponding tab-slot mating pair, such that said raised dome slideably engages with said recessed cavity; said coupling means providing an effective seam when said two housing members are joined; whereby said enclosure is formed.
Claim 3
Dependent Claim 20 words
The enclosure of claim 1, wherein said tabs and slots are spaced apart along joining edges of said housing members.
Claim 4
Dependent Claim 34 words
The enclosure of claim 2, wherein interior surfaces and mating surfaces of said enclosure are coated with a conducting material, such that said coupling means functions as an electrical switch between said housing members.
Claim 5
Dependent Claim 22 words
The enclosure of claim 3 wherein said tabs have a beveled end to allow easier entry of said tabs into said slots.
Claim 6
Dependent Claim 17 words
The enclosure of claim 4, wherein said tabs are disposed along said interior surface of said enclosure.
Claim 7
Dependent Claim 20 words
The enclosure of claim 5 wherein said enclosure is constructed from a plastic material and said conducting material is metallic.
Claim 8
Dependent Claim 16 words
The enclosure of claim 6, wherein said enclosure is used to confine a computer device therein.
Claim 9
Dependent Claim 124 words
A computer enclosure for inhibiting emanation of electromagnetic radiation comprising: a housing having a base, side walls and a plurality of spaced apart slots along at least one of said side walls: a removable cover having a plurality of extended tabs disposed thereon; wherein each of said tabs further includes a raised dome disposed on a surface facing said slots and said housing further includes a recessed cavity within each of said slots, such that said domes slideably engage said slots and mate with said cavity such that said slots attach said cover to said housing; said housing and cover having a coating which inhibits passage of electromagnetic radiation; whereby an effective seam is provided to inhibit emanation of electromagnetic radiation from said enclosure.
Claim 10
Dependent Claim 124 words
A computer enclosure for inhibiting emanation of electromagnetic radiation comprising: a housing having a base, side walls and a plurality of spaced apart slots along at least one of said side walls: a removable cover having a plurality of extended tabs disposed thereon; wherein each of said tabs further includes a raised dome disposed on a surface facing said slots and said housing further includes a recessed cavity within each of said slots, such that said domes slideably engage said slots and mate with said cavity such that said slots attach said cover to said housing; said housing and cover having a coating which inhibits passage of electromagnetic radiation; whereby an effective seam is provided to inhibit emanation of electromagnetic radiation from said enclosure.
Claim 11
Dependent Claim 30 words
The enclosure of claim 8, wherein said tabs are formed along an interior surface of said cover and said slots are formed as indentations to interior surface of said housing.
Claim 12
Dependent Claim 43 words
The enclosure of claim 9, wherein said interior and mating surfaces of said cover and housing are coated with a conducting material, such that said tabs and slots function as a switch electrically coupling said interior conducting surfaces of said cover and housing.
Claim 13
Dependent Claim 17 words
The enclosure of claim 10, wherein said tabs are formed as a unibodied extension of said cover.
Claim 14
Dependent Claim 16 words
The enclosure of claim 11, wherein said cover and housing are constructed from a plastic material.
Claim 15
Dependent Claim 22 words
The enclosure of claim 12 wherein said tabs have a beveled end to allow easier entry for said tabs into said slots.
Claim 16
Dependent Claim 24 words
The enclosure of claim 13, wherein some of said tabs have extended projections to function as guides during initial stages of attaching said cover.
Claim 17
Dependent Claim 18 words
The enclosure of claim 14, wherein said coating is a layer of aluminum of approximately 2.5-5.0 microns thick.
Claim 18
Dependent Claim 14 words
The enclosure of claim 15, wherein said enclosure is used as a computer casing.
Claim 19
Dependent Claim 36 words
The enclosure of claim 13, wherein said housing has a plurality of said tabs disposed along at least one of said sidewalls and a plurality of slots disposed along a corresponding mating sidewall of said cover.
Claim 20
Dependent Claim 164 words
A computer enclosure for inhibiting emanation of electromagnetic radiation comprising: a housing having a base, sidewalls and an upper opening, said housing having a plurality of spaced-apart slots formed into an interior surface of said housing and disposed adjacent to said opening; a removable cover having a top surface and joining edges to mate to said side walls of said housing, said cover having a plurality of extended tabs disposed thereon, said tabs slideably engaging said slots to attach said cover to said housing; wherein each of said tabs includes a convex dome disposed on said flat surface of said tab facing its corresponding slot and said housing further including a concave cavity disposed within each of said slots, such that said domes slideably engage said slots and mate with said cavity; a conductive coating disposed on interior surfaces of said cover and said housing, and said mating surfaces of said tabs and slots; whereby an effective seam to seal said enclosure is achieved.
Claim 21
Dependent Claim 164 words
A computer enclosure for inhibiting emanation of electromagnetic radiation comprising: a housing having a base, sidewalls and an upper opening, said housing having a plurality of spaced-apart slots formed into an interior surface of said housing and disposed adjacent to said opening; a removable cover having a top surface and joining edges to mate to said side walls of said housing, said cover having a plurality of extended tabs disposed thereon, said tabs slideably engaging said slots to attach said cover to said housing; wherein each of said tabs includes a convex dome disposed on said flat surface of said tab facing its corresponding slot and said housing further including a concave cavity disposed within each of said slots, such that said domes slideably engage said slots and mate with said cavity; a conductive coating disposed on interior surfaces of said cover and said housing, and said mating surfaces of said tabs and slots; whereby an effective seam to seal said enclosure is achieved.
Claim 22
Dependent Claim 18 words
The computer enclosure of claim 18, wherein said tabs are indented from an outer surface of said cover.
Claim 23
Dependent Claim 28 words
The computer enclosure of claim 19, wherein said cover and housing are molded from a plastic material, and said tabs are molded as unibodied extensions of said cover.
Claim 24
Dependent Claim 32 words
The computer enclosure of claim 20 wherein said conductive coating is metallic and said tabs and slots function as a switch electrically coupling said interior conducting surfaces of said cover and housing.
Claim 25
Dependent Claim 23 words
The computer enclosure of claim 21 wherein said tabs have a beveled end to allow easier entry of said tabs into said slots.
Claim 26
Dependent Claim 25 words
The computer enclosure of claim 22, wherein some of said tabs have extended projections to function as guides during initial stages of attaching said cover.
Claim 27
Dependent Claim 15 words
The computer enclosure of claim 23, wherein said enclosure and cover are rectangular in shape.
Claim 28
Dependent Claim 37 words
The computer enclosure of claim 24, wherein said housing has a plurality of said tabs disposed along at least one of said sidewalls and a plurality of slots disposed along a corresponding mating sidewall of said cover.

References Cited (Backward Citations)

US4533805A Cited
US4663240A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-07-26 1992-01-25 1992-07-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-07-26 1996-01-25 1996-07-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-07-26 2000-01-25 2000-07-26 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag