US3884744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for welding shoe parts
Assignee: Z ELEKTROTEPELNYCH ZARIZCHI HA
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Filing: 1973-05-31
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Granted: 1975-05-20
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Expires: 1993-05-31
Abstract
Abstract Apparatus for the high frequency welding of shoe parts and the like includes a table for receiving the shoe parts, a frame extending above the table and a plurality of pressure cylinders arranged on said frame and having piston rods extending downwardly toward the table. Each of the piston rods are provided with heads adapted to removably mount both welding electrodes and clamp members. The outer heads of each of the piston rods are provided with a spring contact extending therefrom while a countercontact is removably arranged on a terminal board mounted adjacent to the pistons on the frame of the apparatus. The spring and countercontacts are adapted to be connected in series with the high frequency energizing circuit and the source of high frequency energy. The terminal board itself is arranged on the frame level with the bottom dead center of the electrodes when the piston rods are extended outwardly at their greatest distance. Thus energization of the high frequency circuit will take place only when selected ones of the pistons are provided with both the spring and countercontacts and when those pistons are extended.
Inventors
- 👤 Jaromir Ranocha
- 👤 Dusan Repka
- 👤 Bohumil Machu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:21
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/90; B29C66/91; B29C66/92; B29C66/924; B29C66/9261; B29C66/94; B29C66/944; B29L; B29L2031/00; B29L2031/48; B29L2031/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
Apparatus for the high frequency welding of articles such as shoe parts and the like comprising a table for receiving said shoe parts, a frame extending above said table, a plurality of pressure cylinders arranged on said frame having piston rods extending downwardly therefrom, means for actuating said cylinders to extend said rods toward said table, means for removably mounting to the ends of selected ones of said piston rods either an electrode or a clamp, a terminal board mounted on said frame and connected to a source of current, first contacts adapted to be mounted on respective ones of said piston rods and extend therefrom toward said terminal board, second contacts adapted to be mounted on said terminal board, each of said second contacts being adapted to extend from said terminal board in association with a selected one of said first contacts, at least one of each of said associated first and second contacts being removably mounted respectively to said piston rod and terminal board so as to permit engagement of said contacts in association with selected ones of said piston rods, said terminal board being arranged on said frame so that the first and second contacts engage at the bottommost dead center position of said piston rods.
Claim 2
Dependent Claim
209 words
Apparatus for the high frequency welding of articles such as shoe parts and the like comprising a table for receiving said shoe parts, a frame extending above said table, a plurality of pressure cylinders arranged on said frame having piston rods extending downwardly therefrom, means for actuating said cylinders to extend said rods toward said table, means for removably mounting to the ends of selected ones of said piston rods either an electrode or a clamp, a terminal board mounted on said frame and connected to a source of current, first contacts adapted to be mounted on respective ones of said piston rods and extend therefrom toward said terminal board, second contacts adapted to be mounted on said terminal board, each of said second contacts being adapted to extend from said terminal board in association with a selected one of said first contacts, at least one of each of said associated first and second contacts being removably mounted respectively to said piston rod and terminal board so as to permit engagement of said contacts in association with selected ones of said piston rods, said terminal board being arranged on said frame so that the first and second contacts engage at the bottommost dead center position of said piston rods.
Claim 3
Dependent Claim
33 words
The apparatus according to claim 1 wherein said first contact comprises a spring and said second contacts are adjustably positioned along said terminal board in locations corresponding to selected ones of said pistons.
Claim 4
Dependent Claim
181 words
The apparatus according to claim 1 including circuit means for cyclically operating said piston rods to which electrodes are attached to move said electrodes into cOntact with the shoe parts, comprising valve means for actuating said respective piston rods, a pair of connecting relays having contacts operating said valve means, a multi position switch for selecting predetermined ones of said relay contacts according to a predetermined order of operation, a central control switch, a toggle circuit connected to said central control switch said central control switch having a governing relay, said governing relay having contacts for selectively operating said connecting relays on operation of said toggle circuit, said connecting relays having normally open contacts interposed in series between the control switch and the governing relay arranged in parallel to said control switch, a microswitch associated with each of said pistons and closable upon descent thereof, said microswitches being interposed between the source of current and the corresponding piston rods to which an electrode is attached to permit current to flow only when said corresponding piston rod is in its downmost position.
Claim 5
Dependent Claim
56 words
The apparatus according to claim 1 wherein each of said cylinders includes an axially extending sleeve in which the piston rod is housed, said sleeve being threaded on its external surface and provided with a regulating nut threadably mounted thereon, said nut being adjustable to vary the axial position of said sleeve relative to said cylinder.
Claim 6
Dependent Claim
65 words
Apparatus according to claim 1 wherein each of said pressure cylinders is formed with a stepped bore of smaller diameter at each of its frontal ends, a throttling port extending from each of said bores and the piston rod carries a piston having flanking portions adapted to fit within the reduced bores whereby the fluid within said cylinder is meted outwardly of said throttling port.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |