US3689117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a neutralizing device
Assignee: 3M Co
•
Filing: 1970-07-17
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Granted: 1972-09-05
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Expires: 1990-07-17
Abstract
Abstract A method for manufacturing a brush like device for neutralizing static electrical charges from resilient, supple conductive filaments of minute diameter. The method includes positioning two support rods in spaced parallel relationship, winding the filaments spirally about the pair of rods with successive windings being in side by side relationship, attaching the contacting section of the filaments to the rods, and severing the filaments extending between the two rods to produce two devices.
Inventors
- 👤 Conrad G Hules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:41
CPC Classifications
A; A46; A46D; A46D3/00; A46B; A46B3/00; A46B3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49787
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
A method of manufacturing brush-like neutralizing devices for reduction of static electrical charges on a surface which comprises the steps of: positioning two stiff support rods on a frame in a parallel opposed spaced relationship; winding a strand comprised of supple electrically conductive carbonaceous filaments about the two rods so that the lengths of the strand contacting each rod are uniformly spaced axially along the rods; securing the strand to the rods by applying an adhesive potting compound to the lengths of the strand contacting the rods, and for each rod pressing a stiff conductive U-shaped shield over and into contact with the lengths of the strand contacting the rod and the uncured potting compound with the legs of the shield extending in the direction of the lengths of the strand extending between the rods; severing the strand at positions between the two rods to form free ends of the filaments and two brush-like neutralizing devices; and removing the neutralizing devices from the frame.
Claim 2
Independent Claim
164 words
A method of manufacturing brush-like neutralizing devices for reduction of static electrical charges on a surface which comprises the steps of: positioning two stiff support rods on a frame in a parallel opposed spaced relationship; winding a strand comprised of supple electrically conductive carbonaceous filaments about the two rods so that the lengths of the strand contacting each rod are uniformly spaced axially along the rods; securing the strand to the rods by applying an adhesive potting compound to the lengths of the strand contacting the rods, and for each rod pressing a stiff conductive U-shaped shield over and into contact with the lengths of the strand contacting the rod and the uncured potting compound with the legs of the shield extending in the direction of the lengths of the strand extending between the rods; severing the strand at positions between the two rods to form free ends of the filaments and two brush-like neutralizing devices; and removing the neutralizing devices from the frame.
Claim 3
Dependent Claim
57 words
A method of manufacturing brush-like neutralizing devices according to claim 1 wherein said step of winding comprises: guiding the strand onto the rods; rotating the frame about an axis parallel to and centered between the rods to wind the strand about the two rods; and moving the guide point at a predetermined rate axially of the rods.
Claim 4
Dependent Claim
100 words
A method of manufacturing brush-like neutralizing devices according to claim 1 wherein the frame includes a bar parallel to and centered between the rods and having opposed planar faces positioned to be parallel to the lengths of the wound strand extending between the rods, and said step of severing comprises; pressing the wound strand into contact with the adjacent planar surface of the bar along a line equal distant from the axis with the straight edge of a guide plate; and cutting against the planar surface along the straight edge with the blade of a knife to sever the strand.
Claim 5
Independent Claim
148 words
A method of manufacturing brush-like devices comprising strands of supple fibers which comprises the steps of: positioning two stiff support rods on a frame in a parallel opposed spaced relationship; winding a strand of supple fibers about the two rods so that the lengths of the strand contacting each rod are uniformly spaced axially along the rods; securing the strand to the rods by applying an adhesive potting compound to the lengths of the strand contacting the rods, and for each rod pressing a stiff U-shaped shield over the lengths of the strand contacting the rod and the uncured potting compound with the legs of the shield extending in the direction of the lengths of the strand extending between the rods; severing the strand at positions between the two rods to form free ends of the filaments and two brush-like devices; and removing the devices from the frame.
Claim 6
Independent Claim
148 words
A method of manufacturing brush-like devices comprising strands of supple fibers which comprises the steps of: positioning two stiff support rods on a frame in a parallel opposed spaced relationship; winding a strand of supple fibers about the two rods so that the lengths of the strand contacting each rod are uniformly spaced axially along the rods; securing the strand to the rods by applying an adhesive potting compound to the lengths of the strand contacting the rods, and for each rod pressing a stiff U-shaped shield over the lengths of the strand contacting the rod and the uncured potting compound with the legs of the shield extending in the direction of the lengths of the strand extending between the rods; severing the strand at positions between the two rods to form free ends of the filaments and two brush-like devices; and removing the devices from the frame.
Claim 7
Dependent Claim
56 words
A method of manufacturing brush-like devices according to claim 4 wherein said step of winding comprises: guiding the strand onto the rods; rotating the frame about an axis parallel to and centered between the rods to wind the strand about the two rods; and moving the guide point at a predetermined rate axially of the rods.
Claim 8
Dependent Claim
33 words
A method of manufacturing brush-like devices according to claim 4 wherein said step of severing comprises severing the length of the strand extending between the rods equidistant from the axes of the rods.
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |