Patent US2911537A successfully refreshed from Google Patents.
Patent US4457665A successfully refreshed from Google Patents.
US4457665A
Expired / Lapsed
US
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Method for removing individual articles from a stack
Assignee: Schweizerische Industrie Gesellschaft
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Filing: 1982-05-11
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Granted: 1984-07-03
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Expires: 2002-05-11
Abstract
Abstract A method for removing at least one flat article at a time from an at least approximately vertical stack of articles supported on a support surface, by the steps of pushing at least the lowermost article in the stack sideways away from the stack by moving an ejector member transversely to the stack, and approximately simultaneously with the contact of the ejector member at the lowermost article, lowing the support surface in such a manner that the ejector member ejects the lowermost article from the stack during free fall of the lowermost article.
Inventors
- 👤 Rene Fluck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:43
CPC Classifications
B; B65; B65G; B65G59/00; B65G59/06; B65G59/067
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
A method for removing at least one flat article at a time from an at least approximately vertical stack of articles supported on a support surface, comprising: pushing at least the lowermost article in the stack sideways away from the stack by moving an ejector member transversely to the stack; and approximately simultaneously with the contact of the ejector member at the lowermost article, lowering the support surface in such a manner that the ejector member ejects the lowermost article from the stack during free fall of the lowermost article wherein said step of lowering comprises lowering the support surface at a speed greater than the free fall velocity of the stack at least prior to the initial contact between the ejector member and the lowermost article, and the steps of pushing and lowering are carried out in a manner to cause the lowermost article to undergo free fall at least until the lowermost article has been pushed entirely away from beneath the next article in the stack above the lowermost article.
Claim 2
Independent Claim
172 words
A method for removing at least one flat article at a time from an at least approximately vertical stack of articles supported on a support surface, comprising: pushing at least the lowermost article in the stack sideways away from the stack by moving an ejector member transversely to the stack; and approximately simultaneously with the contact of the ejector member at the lowermost article, lowering the support surface in such a manner that the ejector member ejects the lowermost article from the stack during free fall of the lowermost article wherein said step of lowering comprises lowering the support surface at a speed greater than the free fall velocity of the stack at least prior to the initial contact between the ejector member and the lowermost article, and the steps of pushing and lowering are carried out in a manner to cause the lowermost article to undergo free fall at least until the lowermost article has been pushed entirely away from beneath the next article in the stack above the lowermost article.
Claim 3
Dependent Claim
34 words
Method as defined in claim 1 further comprising moving an abutment for at least the next article in the stack above the article pushed sideways from the stack in synchronism with the support surface.
Claim 4
Dependent Claim
40 words
Method as defined in claim 1 or 2 further comprising subjecting the ejector member to an up and down movement simultaneously with its movement transversely to the stack to follow at least approximately the descent of the falling lowermost article.
Claim 5
Dependent Claim
38 words
Method as defined in claim 1 wherein the ejector member is driven by two separate drive means and is composed of an ejector which is fastened to a push rod driven by one of the separate drive means.
Claim 6
Dependent Claim
33 words
Method as defined in claim 4 wherein the support surface is rigidly connected to an abutment for at least the next article in the stack above the article pushed sideways from the stack.
Claim 7
Dependent Claim
32 words
Method as defined in claim 1 carried out during the formation of packagable stacks composed of a plurality of independently assembled stacks of articles, such as cookies, crackers, sandwiches or the like.
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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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |