US3926601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making glass blades
Assignee: Polaroid Corp
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Filing: 1974-06-10
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Granted: 1975-12-16
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Expires: 1994-06-10
Abstract
Abstract A blank of a plurality of vitreous materials is prepared by selecting a first vitreous material which is relatively resistant to chemical etching and grinding it to a desired blade configuration with dimensions which are a multiple of the dimension of the desired end product as represented by a predetermined attenuation ratio, then a second vitreous material which is susceptible to chemical etching is selected and prepared to have a portion complementary to said blade portion of said first material, and the blank comprising both materials positioned in complementary contacting relationship is heated to about their softening points and drawn down with a desired attenuation to produce a continuous blade ribbon in said first vitreous material of uniform predetermined cross-sectional dimensions. The second material is then etched away from the ribbon comprising the first material and cut into desired blade lengths.
Inventors
- 👤 Jr John Wilbur Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:00
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; C; C03; C03B; C03B23/00; C03B23/04; C03B23/047; Y; Y10; Y10S; Y10S76/00; Y10S76/08; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
57 words
THE METHOD OF PRODUCING GLASS BLADES COMPRISING THE STEPS OF A. FORMING A FIRST VITREOUS MATERIAL RESISTANT TO CHEMICAL ETCHING WITH A SHARP EDGE CONFIGURATION, SAID MATERIAL BEING OF A CROSS-SECTION HAVING A PERIMETER WITH FIRST AND SECOND SIDES INTERSECTING AT AN ACUTE ANGLE TO FORM SAID SHARP EDGE CONFIGURATION, B. FORMING A COMBINATION GLASS BLANK COMPRISING
Claim 2
Independent Claim
57 words
THE METHOD OF PRODUCING GLASS BLADES COMPRISING THE STEPS OF A. FORMING A FIRST VITREOUS MATERIAL RESISTANT TO CHEMICAL ETCHING WITH A SHARP EDGE CONFIGURATION, SAID MATERIAL BEING OF A CROSS-SECTION HAVING A PERIMETER WITH FIRST AND SECOND SIDES INTERSECTING AT AN ACUTE ANGLE TO FORM SAID SHARP EDGE CONFIGURATION, B. FORMING A COMBINATION GLASS BLANK COMPRISING
Claim 3
Dependent Claim
5 words
SAID FIRST VITREOUS MATERIAL AND
Claim 4
Dependent Claim
5 words
SAID FIRST VITREOUS MATERIAL AND
Claim 5
Dependent Claim
122 words
A SECOND VITREOUS MATERIAL SUSCEPTIBLE TO CHEMICAL ETCHING INCLUDING A PERIMETER, PART OF WHICH IS IN CONTACT WITH AT LEAST A PORTION OF ONE OF SAID SIDES OF SAID SHARP EDGE CONFIGURATION OF SAID FIRST MATERIAL, C. HEATING SUCH COMBINATION BLANK TO A TEMPERATURE CORRESPONDING TO THE SOFTENING POINTS OF THE VITREOUS MATERIALS AND SUFFICIENT TO DRAW AND ATTENUATE SAME, D. DRAWING THE HEATED COMBINATION BLANK AND ATTENUATING THE SAME DOWN TO A DESIRED SIZE WHILE PROTECTING THE SHARP EDGE CONFIGURATION BY MEANS OF SAID CONTACT, E. THEN REMOVING THE SECOND VITREOUS MATERIAL FROM THE DRAWN AND ATTENUATED COMBINATION BLANK BY MEANS OF A CHEMICAL ETCHING PROCESS TO WHICH THE SECOND MATERIAL IS SUSCEPTIBLE AND TO WHICH THE FIRST MATERIAL IS RESISTANT.
Claim 6
Dependent Claim
122 words
A SECOND VITREOUS MATERIAL SUSCEPTIBLE TO CHEMICAL ETCHING INCLUDING A PERIMETER, PART OF WHICH IS IN CONTACT WITH AT LEAST A PORTION OF ONE OF SAID SIDES OF SAID SHARP EDGE CONFIGURATION OF SAID FIRST MATERIAL, C. HEATING SUCH COMBINATION BLANK TO A TEMPERATURE CORRESPONDING TO THE SOFTENING POINTS OF THE VITREOUS MATERIALS AND SUFFICIENT TO DRAW AND ATTENUATE SAME, D. DRAWING THE HEATED COMBINATION BLANK AND ATTENUATING THE SAME DOWN TO A DESIRED SIZE WHILE PROTECTING THE SHARP EDGE CONFIGURATION BY MEANS OF SAID CONTACT, E. THEN REMOVING THE SECOND VITREOUS MATERIAL FROM THE DRAWN AND ATTENUATED COMBINATION BLANK BY MEANS OF A CHEMICAL ETCHING PROCESS TO WHICH THE SECOND MATERIAL IS SUSCEPTIBLE AND TO WHICH THE FIRST MATERIAL IS RESISTANT.
Claim 7
Dependent Claim
122 words
a second vitreous material susceptible to chemical etching including a perimeter, part of which is in contact with at least a portion of one of said sides of said sharp edge configuration of said first material, c. heating such combination blank to a temperature corresponding to the softening points of the vitreous materials and sufficient to draw and attenuate same, d. drawing the heated combination blank and attenuating the same down to a desired size while protecting the sharp edge configuration by means of said contact, e. then removing the second vitreous material from the drawn and attenuated combination blank by means of a chemical etching process to which the second material is susceptible and to which the first material is resistant.
Claim 8
Dependent Claim
122 words
a second vitreous material susceptible to chemical etching including a perimeter, part of which is in contact with at least a portion of one of said sides of said sharp edge configuration of said first material, c. heating such combination blank to a temperature corresponding to the softening points of the vitreous materials and sufficient to draw and attenuate same, d. drawing the heated combination blank and attenuating the same down to a desired size while protecting the sharp edge configuration by means of said contact, e. then removing the second vitreous material from the drawn and attenuated combination blank by means of a chemical etching process to which the second material is susceptible and to which the first material is resistant.
Claim 9
Dependent Claim
39 words
The method of producing glass blades as claimed in claim 1 in which the combination blank is formed in the form of a rod with the sharp edge of the first material located at a surface of the rod.
Claim 10
Dependent Claim
60 words
The method of producing glass blades as claimed in claim 2 which comprises the preliminary steps of producing a preliminary combination glass blank of the first and second vitreous materials in contacting relation to form a common plane and forming a sharp edge configuration in the first of said materials by cutting through said common plane at an acute angle.
Claim 11
Dependent Claim
45 words
The method of producing glass blades as claimed in claim 1 in which the combination blank is formed with the second material in face contacting relationship with the sharp edge and at least major portions of said first and second sides of said first material.
Claim 12
Dependent Claim
26 words
The method of producing glass blades as claimed in claim 1 in which the combination blank is formed in the shape of an elongated cylindrical rod.
Claim 13
Dependent Claim
27 words
The method of producing glass blades as claimed in claim 1 in which at least one of the said sides formed in the first material is non-planar.
Claim 14
Dependent Claim
21 words
The method as claimed in claim 1 which includes the further steps of cutting the first material into desired blade lengths.
Claim 15
Dependent Claim
26 words
The method as defined in claim 7 which includes the further steps of preparing a blade portion of non-vitreous material and affixing the glass blade thereto.
Claim 16
Dependent Claim
22 words
The method as defined in claim 7 which includes the further steps of preparing a blade holder and affixing the blade thereto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |