Channel shaped laminated high temperature slot wedge for dynamoelectric machines

{
  "publication_number": "US3852137A",
  "country": "US",
  "kind": "A",
  "title": "Channel shaped laminated high temperature slot wedge for dynamoelectric machines",
  "abstract": "A rigid, laminated, thin ''''slot wedge'''' construction is described along with the method for fabricating it from flexible, normally difficult to form plastics. The laminated wedge is channel shaped with well defined corners to provide firm seating of the wedge in the slots of a dynamoelectric machine. A rigid, laminated channel shaped slot wedge having excellent corner definition is produced from thin, flexible high temperature plastics such as ''''Kapton'''' polyimide film or ''''Nomex'''' polyamide sheets by laminating them with an adhesive which is rigid when cured. The laminate is baked and the adhesive cured while it is held in the desired channel form by a clamping fixture. This imparts the desired rigidity and long term corner definition to the wedge while yet retaining the desired high temperature qualities of the individual laminations.",
  "claims": [
    "1. COATING A PLURALITY OF THIN, RESILIENT, HIGH TEMPERATURE POLYAMIDE FILMS WITH A CURABLE, EPOXYLATED, NOVOLAC, RESIN ADHESIVE; A PROCESS FOR FABRICATING A CHANNEL-SHAPED, LAMINATED, SLOT WEDGE COMPRISING THE STEPS OF:",
    "2. PRESSING TOGETHER SAID PLURALITY OF POLYIMIDE FILMS, SAID POLYIMIDE FILMS HAVING THEIR CONTACTING SURFACES COATED WITH THE UNCURED EPOXYLATED NOVOLAC RESIN ADHESIVE TO FORM A FLAT LAMINATE, Pressing together said plurality of polyimide films, said polyimide films having their contacting surfaces coated with the uncured epoxylated novolac resin adhesive to form a flat laminate,",
    "3. Forcing the laminate and the as yet uncured adhesive into the desired channel shape, FORCING THE LAMINATE AND THE AS YET UNCURED ADHESIVE INTO THE DESIRED CHANNEL SHAPE,",
    "4. HEATING THE LAMINATE FOR A PERIOD OF THREE HOURS AT A TEMPERATURE IN THE RANGE OF 160*-165*C TO CURE THE EPOXYLATED NOVOLAC RESIN ADHESIVE WHICH THE LAMINATE IS HELD IN THE SAID CHANNEL-SHAPE WHEREBY THE ADHESIVE BECOMES RIGID AND THE RESILIENT FILMS ARE RETAINED IN THE DESIRED CHANNEL CONFIGURATION. Heating the laminate for a period of three hours at a temperature in the range of 160*-165*C to cure the epoxylated novolac resin adhesive which the laminate is held in the said channel-shape whereby the adhesive becomes rigid and the resilient films are retained in the desired channel configuration."
  ],
  "cpc": [
    "H02K 3/487",
    "H02K 15/13",
    "Y10T 156/1002",
    "Y10T 156/1044",
    "Y10T 428/31515",
    "Y10T 428/31721"
  ],
  "assignees": [
    "GEN ELECTRIC"
  ],
  "filing_date": "1972-09-18",
  "publication_date": "1974-12-03",
  "grant_date": "1974-12-03",
  "priority_date": "1971-04-04",
  "application_number": "US-29009572-A",
  "family_id": "26831725",
  "citations": [
    "GB758964A",
    "GB771109A",
    "US2967346A",
    "US3380963A",
    "US3505729A",
    "US3519862A",
    "US3717543A"
  ]
}