Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1989-12-27
1992-08-04
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
264 17, 264 23, B32B 3116
Patent
active
051355922
ABSTRACT:
First and second hydrogel lens members are configured to be ultrasonically welded to one another. Both the first and second lens members have an annular bonding surface. The second lens member has an energy director extending from its bonding surface. The energy director has a generally rectangular cross section, a height of 0.127 to 0.178 millimeter, and an extended smooth surface of 0.127 to 0.381 millimeter width adapted to engage the bonding surface of the first lens member. The smooth extended surface of the energy director of the second lens member is mated with the bonding surface of the first lens member, and pressure in the range of 55.1 to 68.9 KN/m.sup.2 applied thereto to force the lens members together. Ultrasonic energy is applied to the lens members for a weld time period of 0.15 to 0.22 second. Following the weld period, the application of ultrasonic energy is discontinued for a hold time period of 0.15 to 0.25 second. The application of pressure is discontinued following the hold time period.
REFERENCES:
patent: 3630200 (1971-12-01), Higuchi
patent: 4042652 (1977-08-01), Feneberg
patent: 4099859 (1978-07-01), Merrill
patent: 4210391 (1990-07-01), Cohen
patent: 4338005 (1982-07-01), Cohen
patent: 4340283 (1982-07-01), Cohen
patent: 4575372 (1986-03-01), Gundersen
patent: 4618649 (1986-10-01), Ofstead
patent: 4637697 (1987-01-01), Freeman
patent: 4641934 (1987-02-01), Freeman
patent: 4642112 (1987-02-01), Freeman
patent: 4655565 (1987-04-01), Freeman
patent: 4664666 (1987-05-01), Barrett
patent: 4685921 (1987-08-01), Peyman
patent: 4685922 (1987-08-01), Peyman
patent: 4693939 (1987-09-01), Ofstead
patent: 4702865 (1987-10-01), Koziol et al.
patent: 4704016 (1987-11-01), de Carle
patent: 4731078 (1988-03-01), Stoy et al.
patent: 4771089 (1988-09-01), Ofstead
patent: 4797764 (1989-01-01), Doering
patent: 4828558 (1989-05-01), Kelman
patent: 4846833 (1989-07-01), Cumming
O. Wichterle, "Hydrogels," Encyclopedia of Polymer Science and Technology, vol. 15, 1971, pp. 273-291.
Wichterle et al., "Hydrophilic Gels for Biological Use," Nature, 185:117-118, 1960.
Ratner et al., "Synthetic Hydrogels for Biomedical Applications," Hydrogels for Medical and Related Applications, Am. Chem. Soc., Wash., D.C., 1976, pp. 1-35.
R. A. Clarke, "Ultrasonic Assembly," Modern Plastics Encyclopedia, 1980-81, pp. 447-451.
Griswold Gary L.
Kirn Walter N.
Linder Walter C.
Minnesota Mining and Manufacturing Company
Sells J.
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