US3668959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for advancing and simultaneously centering sheet material
Assignee: Ardagh Metal Packaging Germany GmbH
•
Filing: 1970-08-12
•
Granted: 1972-06-13
•
Expires: 1990-08-12
Abstract
Abstract This disclosure relates to a scroll cutting apparatus which is provided with a feed mechanism which automatically assures centering of the sheet material upon each advance thereof prior to the actuation of the scroll cutter. The feed mechanism includes a first feed disposed in advance of the scroll cutter and a second feed between the scroll cutter and a centering stop. Each feed has associated therewith guide means engaging the opposite edges of the sheet material with one half of each guide means being fixed and the other half being resiliently mounted. The feed mechanism includes rollers which rotate to advance the sheet material and which are hunted axially thereof so as to transversely hump the sheet material in cooperation with the guide means so as to perfect the centered feeding of the sheet material.
Inventors
- 👤 Wolfgang Max Egon Richter
- 👤 Edgar Lab
- 👤 Hans Werner Sieblist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:07
CPC Classifications
B; B21; B21D; B21D43/00; B21D43/02; B21D43/021; B21D43/023; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0505; Y10T83/051; Y10T83/0524; Y10T83/0538; Y10T83/0567; Y10T83/444; Y10T83/4564; Y10T83/4567
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
167 words
A process for the feeding and simultaneous transversely centering of sheet material in a scroll cutting operation utilizing a fixed centering step to effect the precision cutting of scroll cut sheets for the further processing of the sheets into stamped parts, the process comprising the steps of advancing the sheet material in a coarse feeding operation relative to a cutter to a position wherein a leading edge of the sheet material is closely in front of the centering stop while simultaneously hunting the sheet material transversely of the direction of feed and applying a lateral guidance load to opposite side edges of the sheet material, discontinuing the coarse feeding operation and the associated guidance and hunting action on the sheet material, and then further advancing the sheet material in a fine feeding operation into engagement with the centering stop while simultaneously further hunting the sheet material transversely of the direction of feed and applying a second lateral guidance load to the opposite edges of the sheet material.
Claim 2
Dependent Claim
167 words
A process for the feeding and simultaneous transversely centering of sheet material in a scroll cutting operation utilizing a fixed centering step to effect the precision cutting of scroll cut sheets for the further processing of the sheets into stamped parts, the process comprising the steps of advancing the sheet material in a coarse feeding operation relative to a cutter to a position wherein a leading edge of the sheet material is closely in front of the centering stop while simultaneously hunting the sheet material transversely of the direction of feed and applying a lateral guidance load to opposite side edges of the sheet material, discontinuing the coarse feeding operation and the associated guidance and hunting action on the sheet material, and then further advancing the sheet material in a fine feeding operation into engagement with the centering stop while simultaneously further hunting the sheet material transversely of the direction of feed and applying a second lateral guidance load to the opposite edges of the sheet material.
Claim 3
Dependent Claim
26 words
Process according to claim 1, characterized in that the hunting of the sheet material takes place transversely to its feed direction functionally independently of the feed.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein the transverse hunting of the sheet material is effected through the mechanism which effects the feeding of the sheet material and independently thereof.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein the edge guidance of the sheet material along one edge is positive and along the opposite edge the edge guidance is loosely resilient.
Claim 6
Dependent Claim
27 words
The process of claim 1 wherein the coarse feeding and guiding occurs in advance of the cutter and the fine feeding and guidance occurs beyond the cutter.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein the second lateral guidance load is applied to the sheet material during the later portion of the coarse feeding operation.
Claim 8
Dependent Claim
187 words
In a scroll cutting apparatus of the type including a scroll cutter and a centering stop for engaging a leading edge of sheet material, a combined feed and guide assembly comprising coarse feed means for simultaneously feeding sheet material past said cutter to a position wherein a leading edge of the sheet material is positioned closely adjacent said centering stop and hunting the sheet material transversely of the direction of sheet material feed, first guide means for engaging opposite edges of the sheet material and in cooperation with the hunting of the sheet material aiding in the centering thereof relative to said scroll cutter, and fine feed means operable independently of said coarse feed means for simultaneously further feeding the leading edge of the sheet material into engagement with the centering stop and hunting the sheet material transversely of the direction of sheet material feed, and second guide means for engaging opposite edges of the sheet material and in cooperation with the hunting of the sheet material by said fine feed means and the centering stop assUring centering of the sheet material relative to said scroll cutter.
Claim 9
Dependent Claim
187 words
In a scroll cutting apparatus of the type including a scroll cutter and a centering stop for engaging a leading edge of sheet material, a combined feed and guide assembly comprising coarse feed means for simultaneously feeding sheet material past said cutter to a position wherein a leading edge of the sheet material is positioned closely adjacent said centering stop and hunting the sheet material transversely of the direction of sheet material feed, first guide means for engaging opposite edges of the sheet material and in cooperation with the hunting of the sheet material aiding in the centering thereof relative to said scroll cutter, and fine feed means operable independently of said coarse feed means for simultaneously further feeding the leading edge of the sheet material into engagement with the centering stop and hunting the sheet material transversely of the direction of sheet material feed, and second guide means for engaging opposite edges of the sheet material and in cooperation with the hunting of the sheet material by said fine feed means and the centering stop assUring centering of the sheet material relative to said scroll cutter.
Claim 10
Dependent Claim
39 words
The scroll cutting apparatus of claim 7 wherein each of said feed means includes a pair of feed rollers engageable with the opposite surfaces of sheet material, said feed rollers being axially movable to effect said sheet material hunting.
Claim 11
Dependent Claim
20 words
The scroll cutting apparatus of claim 8 wherein said feed means are disposed on opposite sides of said scroll cutter.
Claim 12
Dependent Claim
44 words
The scroll cutting apparatus of claim 7 wherein each of said guide means includes lateral guide rollers, means fixedly mounting guide rollers along one edge of the sheet material, and other means resiliently mounting guide rollers along the other edge of the sheet material.
Claim 13
Dependent Claim
43 words
The scroll cutting apparatus of claim 10 wherein the guide rollers of said first guide means are supported by movable supports operable to retract said first guide means out of engagement with the sheet material during the operation of said fine feed means.
Claim 14
Dependent Claim
35 words
The scroll cutting apparatus of claim 7 wherein said first guide means are spaced from said scroll cutter in advance thereof a distance equal to the spacing of said centering stop from said scroll cutter.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |