Video tape storage cabinet

{
  "publication_number": "US4838911A",
  "country": "US",
  "kind": "A",
  "title": "Video tape storage cabinet",
  "abstract": "A videotape storage cabinet is disclosed which includes a housing having a base portion supporting a videotape cooling compartment, a heat sink compartment, and a top, the top for supporting the videotape user equipment. A temperature controlled thermoelectric heat pump is mounted between the compartments with a cold sink and a heat sink extending into the cooling and heating compartments, respectively. The cold sink provides videotape bins designed to support videotapes individually for cooling by the cold sink. A drawer is provided in the cooling compartment for a drying agent. The drying agent may be in either packaged form or bulk form for placement in the drawer. The drying agent is to control the moisture content of the cold air in the cooling compartment. The controlled temperature thermoelectric heat pump is set to maintain the cooling compartment to 65-70 degrees Fahrenheit, and the drying agent sufficient to maintain the relative humidity between 35-45 percent for preservation of the videotapes during storage. The drying agent can be replaced by a small dehumidifying thermoelectric heat pump mounted in the cooling compartment, and a drain provided to remove the moisture.",
  "claims": [
    "1. A storage cabinet for videotapes comprising: a housing of ergonomic design having a base portion; an insulated cooling compartment including a removable drying agent drawer for a preselected amount of drying agent, and a shelf means; a heat removal compartment; a pair of doors; and a top surface; the base portion for supporting the insulated cooling compartment above the dirt and dust floor environment, the pair of doors hinged to side walls of the housing and corresponding one to the other to control access to the cooling compartment; and a temperature controlled thermoelectric heat pump means for cooling the cooling compartment and having a heat sink mounted in the heat removal compartment, a block of conductive material connected to the cold sink, a thermoelectric element connected to the conductive block, and a heat sink connected to the thermoelectric element, the conductive block having a length sufficient for positioning the cold and heat sinks, respectively, within opposing sides of an insulated wall separating the cooling and heat sink compartments, said cold sink having a heat conductive member for connection to the cold side of the thermoelectric heat pump, and a plurality of spaced heat conductive arms normal to the heat conductive member for forming bottoms for the cooling compartment shelf means; said shelf means including vertical partitions coacting with the cold sink arms to form bins for receiving videotapes for storage, said portions of the cold sink arms forming the bottoms of the shelf bins being apertured for allowing air circulation throughout the cooler and drying agent compartments for cooling and drying the air, whereby the storage cabinet provides a dust free, smoke free, humidity and temperature controlled environment for the stored materials.",
    "2. A storage cabinet according to claim 1 wherein said drying agent comprises diatomaceous earth drying agent supported by said drawer in open communication with the cooling compartment.",
    "3. A storage cabinet according to claim 1 further including a dehumidifying means, said humidifying means being a thermoelectric heat pump mounted in the cooling compartment."
  ],
  "description_excerpt": "This application is a continuation of application Ser. No. 077,392, filed 7/24/87, now abandoned.\n\nThis invention relates to cabinets and more particularly to a videotape storage cabinet. As used in this specification and claims the word \"videotape\" includes any high density media such as videotapes, cassettes, films or the like having components which are temperature sensitive and hygroscopic and absorb or lose moisture.\n\nSuccessful long-term storage of videotape recordings has been determined to be possible with this invention. Videotape recorders are sophisticated, precision machines. A video recording is made with a magnetic head which is narrow (about as narrow as a human hair), and travels a mile a minute over a thin film of flexible polyester.\n\nThe tape is made up of components which are hygroscopic and absorb or lose moisture, depending upon the humidity and temperature. It has been established that tape handling on a videotape recorder is dependent on humidity and temperature. The ideal relative humidity for videotapes is between about 35-45 percent. Within this range a good tape and recorder will operate optimally. One-hundred percent relative humidity can never be tolerated. Any condensation of moisture on the tape surface will cause the tape to cling to the tape guiding surface. This is because the water destroys the air film between the tape and the guides; as a result, tape movement will stop and the tape damaged.\n\nTemperatures above approximately 150 degrees Fahrenheit can cause permanent damage to the tape. For long term preservation, the ideal tape temperature is between about 65-70 degrees Fahrenheit.",
  "cpc": [
    "G11B 23/0236",
    "F25B 21/02"
  ],
  "ipc": [
    "F25B 21/02",
    "G11B 23/023"
  ],
  "inventors": [
    "William M. Robertson",
    "Edward J. Burke",
    "Randy L. Clark"
  ],
  "filing_date": "1988-08-26",
  "publication_date": "1989-06-13",
  "grant_date": "1989-06-13",
  "priority_date": "1987-07-24",
  "application_number": "US-23769588-A",
  "family_id": "26759220",
  "cited_by_count": 48,
  "citations": [
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  ]
}