US3692449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the spraying of shoe soles onto shoe shafts
Assignee: Stubbe Maschinenfabrik GmbH
•
Filing: 1970-10-08
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Granted: 1972-09-19
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Expires: 1990-10-08
Abstract
Abstract The improved device disclosed herein is used for the spraying of shoe soles onto shoe shafts. The shoe shafts are drawn over a last that is carried by a movable last slide and are emplaceable upon the sealing edge of molding jaws, which sealing edge bounds a hollow space corresponding to the dimensions of the shoe sole to be formed. The emplacement operation continues until a preselected pressure has been reached between the shoe contour of the shoe shaft nd the sealing edge of the molding jaws. When this preselected pressure is reached, an arresting device is actuated to hold the last slide, and thus the last and shoe shaft, against further movement while the soles are formed on the shoe shafts.
Inventors
- 👤 Manfred Niklarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:02
CPC Classifications
B; B29; B29D; B29D35/00; B29D35/0009; B29D35/0018; B29D35/0027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
209 words
An improved device for the injection of the shoe soles onto shoe shafts adjacent to the contour of the shoe shaft comprising: last means over which shoe shafts may be drawn; mold means including molding jaws having a sealing edge which defines a hollow space corresponding to the dimensions of the shoe sole to be formed on the shoe shaft; last slide means connected to the last means and movable to emplace the shoe shaft drawn over the last means upon the sealing edge of the molding jaws of the molding means; and arresting means for selectively holding the last slide means against further movement; means for sensing the pressure exerted by the shaft contour of the shoe shaft on the sealing edge of the molding jaws of the molding means during emplacement of the shoe shaft drawn over the last means upon the sealing edge of the molding jaws of the molding means, the pressure sensing means including means for actuating the last slide arresting means so that the last slide arresting means holds the last slide means against further movement, when a preselected pressure has been reached between the shaft contour of the shoe shaft and the sealing edge of the molding jaws of the molding means.
Claim 2
Dependent Claim
209 words
An improved device for the injection of the shoe soles onto shoe shafts adjacent to the contour of the shoe shaft comprising: last means over which shoe shafts may be drawn; mold means including molding jaws having a sealing edge which defines a hollow space corresponding to the dimensions of the shoe sole to be formed on the shoe shaft; last slide means connected to the last means and movable to emplace the shoe shaft drawn over the last means upon the sealing edge of the molding jaws of the molding means; and arresting means for selectively holding the last slide means against further movement; means for sensing the pressure exerted by the shaft contour of the shoe shaft on the sealing edge of the molding jaws of the molding means during emplacement of the shoe shaft drawn over the last means upon the sealing edge of the molding jaws of the molding means, the pressure sensing means including means for actuating the last slide arresting means so that the last slide arresting means holds the last slide means against further movement, when a preselected pressure has been reached between the shaft contour of the shoe shaft and the sealing edge of the molding jaws of the molding means.
Claim 3
Dependent Claim
39 words
The improved device as described in claim 1 wherein the arresting means includes: a spar connected to and movable with the last slide means and a means for selectively gripping the spar so as to prevent further movement thereof.
Claim 4
Dependent Claim
37 words
The improved device as described in claim 2 wherein the gripping means includes: a cylinder means surrounding the spar and an elastic means disposed between the cylinder means and the spar which may selectively engage the spar.
Claim 5
Dependent Claim
73 words
The improved device as described in claim 3 wherein the elastic means is an annular elastic member which is connected at its ends with the cylinder means so as to define space between the elastic member and the cylinder means; and wherein the cylinder means includes means for introducing pressurized fluid into the space between the cylinder means and the elastic member for causing the elastic member to be expanded against the spar.
Claim 6
Dependent Claim
92 words
The improved device as described in claim 4 wherein the last slide means is moved in a shoe shaft emplacing direction by a hydraulic fluid piston and cylinder means; wherein the pressure sensing means senses the pressure of the hydraulic fluid acting in the hydraulic fluid piston and cylinder means; wherein the means for introducing pressurized fluid into the space between the cylinder means and the elastic member is actuated by the actuating means when the pressure of the fluid acting in the hydraulic piston and cylinder means exceeds a preselected value.
Claim 7
Dependent Claim
63 words
The improved device as described in claim 5 wherein when the pressure of the hydraulic fluid acting in the hydraulic piston and cylinder means falls below said value, the pressurized fluid in the space between the elastic member and the cylinder means is placed in communication with a sump whereby the spar is again free to move with respect to the cylinder means.
References Cited (Backward Citations)
US3323788A
Cited
US3522632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |