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US3924497A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of dispensing a microfoam sheet

Assignee: Ametek Inc
•
Filing: 1975-02-19
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Granted: 1975-12-09
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Expires: 1995-02-19
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Abstract

Abstract A method of dispensing a microfoam sheet of predetermined length by cutting a web of microfoam by moving a hot wire through apertures between first and second plates of upper and lower members between which the web is moved. Nip rolls move the web a predetermined distance past the hot wire prior to cutting and the web is guided by having guiding surfaces on the plates of the lower member at an angle to the plates of the upper member, such angle extending outwardly in the direction of web travel. The lower member is pivoted into an operative position for cutting and web holding surfaces hold the web between the first plates as the hot wire is moved to cut the web. After cutting, the cut sheet is retained between clamping surfaces of the second plates by friction, ready for use.

Inventors

  • 👤 Angelo Joseph D
  • 👤 Lawrence Maccherone
  • 👤 Frank George Maros

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 22:16
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/06; B26F3/08; B26F3/12; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0414; Y10T83/0448; Y10T83/0453; Y10T83/283; Y10T83/293; Y10T83/444; Y10T83/4587; Y10T83/4592; Y10T83/4645; Y10T83/546

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 401 words
A method of dispensing a microfoam sheet of predetermined size including the steps of: a. positioning the leading edge of a web of microfoam in operative relationship with a web moving means in the form of nip rolls; b. moving the web by means of the nip rolls between upper and lower members, the upper member having means defining first and second plates having an aperture therebetween adapted to receive a web cutting means, the first plate having means defining a web holding surface and the second plate having means defining a web clamping surface, the lower member having means defining first and second plates having an aperture therebetween adapted to receive such web cutting means, the first plate having means defining a web holdinG surface and a web first guiding surface and the second plate having means defining a web clamping and first guiding surface, which first guiding surfaces of the first and second plates of the lower member are disposed at an angle to the holding and clamping surfaces of the first and second plates of the upper member as the web is moved between the upper and lower members, such angle extending outwardly in the direction of web travel, and the web cutting means being positioned out of contact with the web in an inoperative position as such web is moved between the upper and lower members; c. moving the web a predetermined length past the web cutting means with the leading edge extending at least beyond the outer edge of the second plates of the upper and lower members; d. moving the nip rolls out of operative relationship with the web, while simultaneously pivoting the lower member upwardly into an operative position whereby to hold the web between the holding surfaces of the first plates of the upper and lower members and to clamp the web between the clamping surfaces of the second plates of such upper and lower members; e. cutting the web to form a microfoam sheet of predetermined size by moving the cutting means through the apertures between the plates of the upper and lower members, then returning such cutting means to its original inoperative position; f. retaining, by friction, the cut sheet between the clamping surfaces of the second plates of the upper and lower members; and g. pulling the cut sheet from between these second plates of such upper and lower members.
Claim 2
Independent Claim 401 words
A method of dispensing a microfoam sheet of predetermined size including the steps of: a. positioning the leading edge of a web of microfoam in operative relationship with a web moving means in the form of nip rolls; b. moving the web by means of the nip rolls between upper and lower members, the upper member having means defining first and second plates having an aperture therebetween adapted to receive a web cutting means, the first plate having means defining a web holding surface and the second plate having means defining a web clamping surface, the lower member having means defining first and second plates having an aperture therebetween adapted to receive such web cutting means, the first plate having means defining a web holdinG surface and a web first guiding surface and the second plate having means defining a web clamping and first guiding surface, which first guiding surfaces of the first and second plates of the lower member are disposed at an angle to the holding and clamping surfaces of the first and second plates of the upper member as the web is moved between the upper and lower members, such angle extending outwardly in the direction of web travel, and the web cutting means being positioned out of contact with the web in an inoperative position as such web is moved between the upper and lower members; c. moving the web a predetermined length past the web cutting means with the leading edge extending at least beyond the outer edge of the second plates of the upper and lower members; d. moving the nip rolls out of operative relationship with the web, while simultaneously pivoting the lower member upwardly into an operative position whereby to hold the web between the holding surfaces of the first plates of the upper and lower members and to clamp the web between the clamping surfaces of the second plates of such upper and lower members; e. cutting the web to form a microfoam sheet of predetermined size by moving the cutting means through the apertures between the plates of the upper and lower members, then returning such cutting means to its original inoperative position; f. retaining, by friction, the cut sheet between the clamping surfaces of the second plates of the upper and lower members; and g. pulling the cut sheet from between these second plates of such upper and lower members.
Claim 3
Dependent Claim 98 words
The method of claim 1 wherein the web first guiding surfaces of the first and second plates of the lower member are disposed downwardly in the direction of web travel and thus disposed act to guide the leading edge of the web between the upper and lower members without it falling into the aperature between the first and second plates of the lower member, due to the tendency of such leading edge to flex downwardly from the horizontal due to the structure of the web and gravity, as the web is moved between the upper and lower members.
Claim 4
Dependent Claim 123 words
In the method of claim 2 the first plate of the lower member further having means defining a web stripping and second guiding surface and the web holding surface thereof also being a web second guiding surface, the second plate of the lower member further having means defining a web second guiding surface, wherein such second guiding surfaces of the first plate of the lower member and such second guiding surface of the second plate of the lower member are horizontally disposed and act, with the downwardly disposed first guiding surfaces of the first and second plates of the lower member to guide the leading edge of the web between the upper and lower members as the web is moved between such members.
Claim 5
Dependent Claim 55 words
The method of claim 3 wherein the web holding surface of the first plate of the lower member is upwardly disposed in the direction of web travel and pushes into the web to hold the web securely for cutting between the holding surfaces of the first plates of the upper and lower members during cutting.
Claim 6
Dependent Claim 14 words
The method of claim 4 wherein the web cutting means is a hot wire.

References Cited (Backward Citations)

US2272215A Cited
US3207018A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-12-08 1979-06-09 1979-12-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-12-08 1983-06-09 1983-12-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-12-08 1987-06-09 1987-12-09 $7700.00 Window Closed / Lapsed

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