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US3849972A Expired / Lapsed US ⏱️ 0.0 years remaining

Wrapping apparatus

Assignee: FMC Corp
•
Filing: 1973-04-13
•
Granted: 1974-11-26
•
Expires: 1993-04-13
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Abstract

Abstract Article wrapping apparatus including a drum having openings extending through its periphery and which is rotatable sequentially through different locations at which a continuous web of wrapping material is first applied to its periphery across the openings therein, then cut at locations between the drum openings to provide separate sheets, and finally the sheets are at least partially enveloped about articles by urging individual of such articles against the separate sheets and through the drum openings.

Inventors

  • 👤 C Pepmeier
  • 👤 E Lowe

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 01:03
CPC Classifications
B; B65; B65B; B65B7/00; B65B7/16; B65B7/162; B65B7/165

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 327 words
An article wrapping apparatus including a drum having only one end wall and a peripheral wall, said peripheral wall formed of a series of like, rectangular, planar members each having an opening extending therethrough and which are joined in end-to-end relationship to together define a polygon, means for rotating said drum including a stationary plate disposed in directly adjacent, spaced relationship with the drum end wall and a shaft fixed substantially centrally of said end wall and extending through and supported for rotation by said plate, means at one location for delivering a continuous web of wrapping material onto successive portions of the outer surface of said drum peripheral wall and across the openings in said planar members as the drum is rotated, vacuum means for retaining the delivered web on the successive portions of the drum peripheral wall as they travel from the one location to slightly beyond a second location spaced circumferentially from such one location, a separate blade fixed to each of said planar members at like ends thereof, each of said blades forming a portion of the outer surface of the drum peripheral wall and each having an edge which is aligned with the end of the planar member to which it is fixed, a stationary knife at the second location in position to be engaged by said blade edges as the drum is rotated to thereby effect severance of the web into separate sheets whereby at a third location, outwardly of said drum and circumferentially spaced from the second location, individual articles to be wrapped may be urged against the separate sheets of wrapping material and into and through the respective drum openings underlying such sheets and be removed from the open end of said drum, and resilient means carried by and projecting into the openings of the respective planar members for smoothing traveling portions of the separate sheets of wrapping material onto individual articles as they are passed through such openings.
Claim 2
Dependent Claim 327 words
An article wrapping apparatus including a drum having only one end wall and a peripheral wall, said peripheral wall formed of a series of like, rectangular, planar members each having an opening extending therethrough and which are joined in end-to-end relationship to together define a polygon, means for rotating said drum including a stationary plate disposed in directly adjacent, spaced relationship with the drum end wall and a shaft fixed substantially centrally of said end wall and extending through and supported for rotation by said plate, means at one location for delivering a continuous web of wrapping material onto successive portions of the outer surface of said drum peripheral wall and across the openings in said planar members as the drum is rotated, vacuum means for retaining the delivered web on the successive portions of the drum peripheral wall as they travel from the one location to slightly beyond a second location spaced circumferentially from such one location, a separate blade fixed to each of said planar members at like ends thereof, each of said blades forming a portion of the outer surface of the drum peripheral wall and each having an edge which is aligned with the end of the planar member to which it is fixed, a stationary knife at the second location in position to be engaged by said blade edges as the drum is rotated to thereby effect severance of the web into separate sheets whereby at a third location, outwardly of said drum and circumferentially spaced from the second location, individual articles to be wrapped may be urged against the separate sheets of wrapping material and into and through the respective drum openings underlying such sheets and be removed from the open end of said drum, and resilient means carried by and projecting into the openings of the respective planar members for smoothing traveling portions of the separate sheets of wrapping material onto individual articles as they are passed through such openings.
Claim 3
Dependent Claim 29 words
Apparatus as defined in claim 1 further including a deflector within said drum for urging the individual wrapped articles toward and outwardly oF the open end of said drum.
Claim 4
Dependent Claim 135 words
An apparatus as defined in claim 1 wherein said vacuum means includes conduits within each of said planar members at locations spaced from the openings therein, a series of spaced passages extending from said conduits and opening at the outer surfaces of said planar members, perforations extending through the drum end wall with the conduits in the respective planar members together opening into an individual perforation, a channel formed in the surface of said stationary plate in alignment with said perforations and extending arcuately from the one location to a position slightly beyond the second location, a fibrous element positioned between and snugly engaging with the opposing surfaces of said plate and said drum end wall, and means connected to said channel for removing air from said conduits through said perforations, fibrous element and channel.
Claim 5
Dependent Claim 40 words
Apparatus as defined in claim 3 wherein said fibrous element is a felt and serves to minimize the leakage of air between said stationary plate and the drum end wall, and also as a friction brake for controlling drum rotation.

References Cited (Backward Citations)

US3035379A Cited
US3245198A Cited
US3508380A Cited
US3494098A Cited
US3546848A Cited
US3618289A Cited
US3628307A Cited
US3657862A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-25 1978-05-27 1978-11-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-25 1982-05-27 1982-11-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-25 1986-05-27 1986-11-26 $7700.00 Window Closed / Lapsed

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