US5615085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control for add-on electronic devices
Assignee: Seiko Epson Corp
•
Filing: 1995-11-06
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Granted: 1997-03-25
•
Expires: 2015-11-06
Abstract
Abstract An add-on control circuit device for insertion into electronic apparatus such as a laser printer having a first microprocessor with an address line connected to an add-on card connector, a ROM that stores programs for the microprocessor, and a data converter that provides data in the form of memory addresses. The add-on circuit uses a printed circuit board of mounted inside of an add-on cartridge or casing, made from high thermal transfer material such as aluminum. When the cartridge is inserted into a printer, the processor inside of the printer reads identification data stored on a ROM inside of the cartridge and conducts processing according to a specified processing program in response to the identification data. The microprocessor is located in a mounting area near the front end of the cartridge, when viewed along the direction of insertion, so that the microprocessor is more effectively cooled by the flow of cooling air inside of the printer. Other embodiments incorporate cooling structures, thermal transfer materials disposed between heat generating elements and an outside casing, and ventilation holes.
Inventors
- 👤 Kenichi Wakabayashi
- 👤 Chitoshi Takayama
- 👤 Tadashi Shiozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:05
CPC Classifications
B; B41; B41J; B41J29/00; G; G06; G06K; G06K15/00; G06K2215/00; G06K2215/0002; G06K2215/002; G06K2215/0022; G06K2215/0025
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
327 words
An add-on electronic device for use in electronic apparatus having at least a first processor capable of performing logical operations and executing processing steps stored in a first memory connected thereto, a connector configured to receive add-on devices which is coupled to at least an address signal line of the first processor and to an address output converter that converts data into address signals and provides them to the connector, comprising: a second processor configured to perform processing substantially independent of the first processor; second memory means connected to said second processor for storing processing steps for execution thereby; data removal means for extracting data from the address signals output from the electronic apparatus; a mounting area for circuit devices which generate substantially the most heat within said add-on electronic device which is positioned within said add-on electronic device between an approximate center and front end relative to a direction of insertion into said add-on connector of the electronic apparatus; a printed circuit board supporting said mounting area and circuit elements for said add-on electronic device; a casing substantially surrounding said circuit board; a packing component that adheres tightly to said second processor and said casing and is disposed therebetween; and a metallic heat dissipation element disposed on a top surface of said second processor, in which: said casing is made of a material having low thermal conductivity and has a wall; said metallic heat dissipation element is disposed adjacent to said wall of said casing; and said wall of said casing is formed with ventilation holes to allow heat from said metallic heat dissipation element to pass therethrough; the device further comprising elastic means for pushing said second processor in a direction toward said casing in an area adjacent a top surface of said second processor; wherein said elastic means comprises a compressible material installed between the bottom surface of said second processor and said casing and extending through an opening in said printed circuit board.
Claim 2
Dependent Claim
327 words
An add-on electronic device for use in electronic apparatus having at least a first processor capable of performing logical operations and executing processing steps stored in a first memory connected thereto, a connector configured to receive add-on devices which is coupled to at least an address signal line of the first processor and to an address output converter that converts data into address signals and provides them to the connector, comprising: a second processor configured to perform processing substantially independent of the first processor; second memory means connected to said second processor for storing processing steps for execution thereby; data removal means for extracting data from the address signals output from the electronic apparatus; a mounting area for circuit devices which generate substantially the most heat within said add-on electronic device which is positioned within said add-on electronic device between an approximate center and front end relative to a direction of insertion into said add-on connector of the electronic apparatus; a printed circuit board supporting said mounting area and circuit elements for said add-on electronic device; a casing substantially surrounding said circuit board; a packing component that adheres tightly to said second processor and said casing and is disposed therebetween; and a metallic heat dissipation element disposed on a top surface of said second processor, in which: said casing is made of a material having low thermal conductivity and has a wall; said metallic heat dissipation element is disposed adjacent to said wall of said casing; and said wall of said casing is formed with ventilation holes to allow heat from said metallic heat dissipation element to pass therethrough; the device further comprising elastic means for pushing said second processor in a direction toward said casing in an area adjacent a top surface of said second processor; wherein said elastic means comprises a compressible material installed between the bottom surface of said second processor and said casing and extending through an opening in said printed circuit board.
Claim 3
Dependent Claim
29 words
The add-on device of claim 1 further comprising insertion material disposed between the top surface of said second processor and said heat dissipation element that adheres firmly to each.
Claim 4
Dependent Claim
14 words
The add-on device of claim 2 wherein said insertion material comprises a rubber-like material.
Claim 5
Dependent Claim
14 words
The add-on device of claim 2 wherein said insertion material comprises a liquid-like material.
Claim 6
Dependent Claim
23 words
The add-on device of claim 1 further comprising elastic means for pushing said metallic heat dissipation element against said wall of said casing.
Claim 7
Dependent Claim
11 words
The add-on device of claim 1 wherein said casing comprises plastic.
Claim 8
Dependent Claim
20 words
The add-on device of claim 1 wherein circuit elements that generate a substantial amount of heat comprises said second processor.
Claim 9
Dependent Claim
16 words
The add-on device of claim 1 in which said packing component comprises a thermally conductive material.
Claim 10
Dependent Claim
15 words
The add-on device of claim 8 wherein said thermally conductive material comprises a rubber-like material.
Claim 11
Dependent Claim
15 words
The add-on device of claim 8 wherein said thermally conductive material comprises a liquid-like material.
Claim 12
Dependent Claim
13 words
The add-on device of claim 1 wherein said elastic means comprises silicon rubber.
Claim 13
Dependent Claim
22 words
The add-on device of claim 1 further comprising a passage in at least a portion of said casing opposite said second processor.
Claim 14
Dependent Claim
23 words
The add-on device of claim 1 wherein said casing comprises plastic and at least one opening is formed therein opposite said second processor.
Claim 15
Dependent Claim
23 words
The add-on device of claim 1 wherein the electronic apparatus has a housing and a fan for cooling the inside of the housing.
Claim 16
Dependent Claim
46 words
The add-on device of claim 1 wherein said printed circuit board is mounted within said casing so that it sub-divides a volume within said casing into relatively larger and smaller first and second volumes, respectively; and wherein said second processor is positioned within the first volume.
Claim 17
Dependent Claim
63 words
The add-on device of claim 1 further comprising: timing means for providing at least one clock signal of predetermined frequency to at least one preselected circuit element of said add-on electronic device; and frequency regulation means for detecting when said selected circuit element is inactive for a predefined amount of time and for decreasing the clock signal frequency in response to said inactivity.
Claim 18
Dependent Claim
31 words
The add-on device of claim 16 wherein the first processor is configured to detect the circuit element inactivity and provide a frequency regulation signal indicative thereof to said frequency regulation means.
Claim 19
Dependent Claim
32 words
The add-on device of claim 16 wherein said second processor is configured to detect the circuit element inactivity and to provide a frequency regulation signal indicative thereof to said frequency regulation means.
Claim 20
Dependent Claim
15 words
The add-on device of claim 18 wherein said preselected circuit element comprises said second microprocessor.
Claim 21
Dependent Claim
13 words
The add-on device of claim 16 wherein the frequency is decreased to zero.
Claim 22
Dependent Claim
17 words
The add-on device of claim 16 wherein the frequency is decreased to one-half of the predetermined frequency.
Claim 23
Dependent Claim
26 words
The add-on device of claim 1 further comprising air passages on an end of said casing which is configured to extend outside of the electronic apparatus.
Claim 24
Dependent Claim
24 words
The add-on device of claim 22 further comprising a plurality of cooling ridges positioned adjacent said passages which increase the casing surface area exposed.
Claim 25
Dependent Claim
310 words
An add-on electronic device for use in electronic apparatus having at least a first processor capable of performing logical operations and executing processing steps stored in a first memory connected thereto, a connector configured to receive add-on devices which is coupled to at least an address signal line of the first processor and to an address output converter that converts data into address signals and provides them to the connector, comprising: a second processor configured to perform processing substantially independent of the first processor; second memory means connected to said second processor for storing processing steps for execution thereby; data removal means for extracting data from the address signals output from the electronic apparatus; a mounting area for circuit devices which generate substantially the most heat within said add-on electronic device which is positioned within said add-on electronic device between an approximate center and front end relative to a direction of insertion into said add-on connector of the electronic apparatus; a printed circuit board supporting said mounting area and circuit elements for said add-on electronic device; a casing substantially surrounding said circuit board; and a metallic heat dissipation element disposed on a top surface of said second processor, in which: said casing is made of a material having low thermal conductivity and has a wall; said metallic heat dissipation element is disposed adjacent to said wall of said casing; and said wall of said casing is formed with ventilation holes to allow heat from said metallic heat dissipation element to pass therethrough; the device further comprising elastic means for pushing said second processor in a direction toward said casing in an area adjacent a top surface of said second processor; wherein said elastic means comprises a compressible material installed between the bottom surface of said second processor and said casing and extending through an opening in said printed circuit board.
Claim 26
Dependent Claim
310 words
An add-on electronic device for use in electronic apparatus having at least a first processor capable of performing logical operations and executing processing steps stored in a first memory connected thereto, a connector configured to receive add-on devices which is coupled to at least an address signal line of the first processor and to an address output converter that converts data into address signals and provides them to the connector, comprising: a second processor configured to perform processing substantially independent of the first processor; second memory means connected to said second processor for storing processing steps for execution thereby; data removal means for extracting data from the address signals output from the electronic apparatus; a mounting area for circuit devices which generate substantially the most heat within said add-on electronic device which is positioned within said add-on electronic device between an approximate center and front end relative to a direction of insertion into said add-on connector of the electronic apparatus; a printed circuit board supporting said mounting area and circuit elements for said add-on electronic device; a casing substantially surrounding said circuit board; and a metallic heat dissipation element disposed on a top surface of said second processor, in which: said casing is made of a material having low thermal conductivity and has a wall; said metallic heat dissipation element is disposed adjacent to said wall of said casing; and said wall of said casing is formed with ventilation holes to allow heat from said metallic heat dissipation element to pass therethrough; the device further comprising elastic means for pushing said second processor in a direction toward said casing in an area adjacent a top surface of said second processor; wherein said elastic means comprises a compressible material installed between the bottom surface of said second processor and said casing and extending through an opening in said printed circuit board.
Claim 27
Dependent Claim
104 words
The add-on device of claim 24 wherein: said metallic heat dissipation element has a first surface that faces said wall of said casing, and a second surface that faces said second processor; a first portion of said second surface of said metallic heat dissipation element is adhered to said top surface of said second processor; and a second portion of said second surface of said metallic heat dissipation element is external to said top surface of said second processor and is exposed to the interior of said casing to allow heat to be dissipated from said second portion into said interior of said casing.
Claim 28
Dependent Claim
28 words
The add-on device of claim 25, in which a gap is provided between said first surface of said metallic heat dissipation element and said wall of said casing.
Claim 29
Dependent Claim
21 words
The add-on device of claim 24 wherein said metallic heat dissipation element is substantially coextensive with said wall of said casing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-24 | 2000-09-23 | 2001-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-24 | 2004-09-23 | 2005-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-24 | 2008-09-23 | 2009-03-25 | $7700.00 | Window Closed / Lapsed |