US3709643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing containers with complex walls
Assignee: Erca SA
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Filing: 1971-07-12
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Granted: 1973-01-09
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Expires: 1991-07-12
Abstract
Abstract This invention relates to an apparatus for producing in moulds plastic containers having one part at least of their lateral walls a reinforcing sheet. This apparatus is particular in that associated with each female mould is a device for forming a loop in the reinforcing sheet, and a member for placing said loop in the corresponding mould, and that said mould is disposed on a carrier so as to be capable of coming into alignment with the loop forming device, and that means are provided to control, stepwise and sequentially, the formation of a loop in the reinforcing sheet, the alignment of the mould and the forming device, the introduction of the loop into the mould, the re-setting of the mould into the shaping position, and the shaping of a container with complex walls.
Inventors
- 👤 J Nasica
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:38
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/16; B29C51/165; B29C51/167; B29C51/18; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/949; Y10T; Y10T156/00; Y10T156/12; Y10T83/00; Y10T83/647; Y10T83/6476; Y10T83/6489; Y10T83/6491
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
243 words
Apparatus for producing containers with complex walls, comprising on a frame, a. a cylindrical support for a roll of thermoplastic sheet, b. means for transporting said sheet below a heating station, then into a shaping station comprising on one side of the thermoplastic sheet at least one series of female moulds which are movable perpendicularly to the plane of the thermoplastic sheet and which extend over the entire width of said sheet, and on the other side, c. a series of pre-shaping punches of which the number corresponds to the number of moulds, d. a series of mould clamps intended to apply said thermoplastic sheet against the upper end of the moulds, and e. a source of pressure fluid for the definitive shaping of the containers, f. characterized in that associated with each female mould is g. a device for forming a loop in the reinforcing sheet, and h. a member for placing said loop in the corresponding mould, i. and that said mould is disposed on a carrier so as to be capable of coming into alignment with the loop forming device, and j. that means are provided to control, stepwise and sequentially, k. the formation of a loop in the reinforcing sheet, l. the alignment of the mould and the forming device, m. the introduction of the loop into the mould, n. the resetting of the mould into the shaping position, and o. the shaping of a container with complex walls.
Claim 2
Dependent Claim
243 words
Apparatus for producing containers with complex walls, comprising on a frame, a. a cylindrical support for a roll of thermoplastic sheet, b. means for transporting said sheet below a heating station, then into a shaping station comprising on one side of the thermoplastic sheet at least one series of female moulds which are movable perpendicularly to the plane of the thermoplastic sheet and which extend over the entire width of said sheet, and on the other side, c. a series of pre-shaping punches of which the number corresponds to the number of moulds, d. a series of mould clamps intended to apply said thermoplastic sheet against the upper end of the moulds, and e. a source of pressure fluid for the definitive shaping of the containers, f. characterized in that associated with each female mould is g. a device for forming a loop in the reinforcing sheet, and h. a member for placing said loop in the corresponding mould, i. and that said mould is disposed on a carrier so as to be capable of coming into alignment with the loop forming device, and j. that means are provided to control, stepwise and sequentially, k. the formation of a loop in the reinforcing sheet, l. the alignment of the mould and the forming device, m. the introduction of the loop into the mould, n. the resetting of the mould into the shaping position, and o. the shaping of a container with complex walls.
Claim 3
Dependent Claim
52 words
An apparatus according to claim 1, characterized in that a. the Loop forming device comprises a series of return rollers which guide the reinforcing sheet towards a pair of feed-in and b. drive rollers provided on each side of a slot which gives access to a cavity of the loop forming device.
Claim 4
Dependent Claim
101 words
An apparatus according to claim 2, characterized in that a. the loop forming device is arranged in the apparatus at a location below the plane of movement of the thermoplastic sheet and close to the shaping station and b. the female moulds are articulated on a horizontal shaft which is rigidly fixed to the carrier for the moulds which are movable in a vertical direction, c. the carrier being provided with a control means to pivot the moulds from their vertical position into a horizontal position in which they are in alignment with the corresponding cavities of the loop forming device.
Claim 5
Dependent Claim
63 words
An apparatus according to claim 1, characterized in that on one side of the frame there is provided a. a cylindrical support for a roll of main reinforcing sheet, b. a mechanism for cutting the main sheet into individual strips, and c. a mechanism for the common, stepwise entrainment of the main reinforcing sheet and the different reinforcing sheets cut into strip form.
Claim 6
Dependent Claim
52 words
An apparatus according to claim 1, characterized in that a. a single setting photoelectric cell is located opposite a reinforcing sheet, b. a return roller which is adjustable for position being interposed in the path of movement of the reinforcing strips or sheets towards the corresponding cavities of the loop forming device.
Claim 7
Dependent Claim
26 words
An apparatus according to claim 3, characterized in that the loop forming device comprises means for cutting the portion of reinforcing sheet placed in the cavity.
Claim 8
Dependent Claim
52 words
An apparatus according to claim 6, characterized in that the cutting means comprise a. a fixed blade b. and a movable blade located on each side of the slot leading to the cavity of the loop forming device, the movable blade being displaced rhythmically after each stepwise advance of the reinforcing sheet.
Claim 9
Dependent Claim
72 words
An apparatus according to claim 4, characterized in that the mechanism for cutting the main sheet into individual sheets or strips comprises a support roller connected to the drive wheel and provided with annular grooves of which a lateral vertical wall forms the blade cooperating member for a cutting blade provided on the external periphery of a hollow roller which is supported eccentrically by a shaft and applied against the support roller.
Claim 10
Dependent Claim
45 words
An apparatus according to claim 4, characterized in that the support roller for the main reinforcing sheet or strip, the stepwise entrainment mechanism and the cutting mechanism are mounted beside the heating and shaping station parallel to the path of movement of the thermoplastic sheet.
Claim 11
Dependent Claim
50 words
An apparatus according to claim 3, characterized in that the device for forming loops in the individual reinforcing sheets is disposed below the path of movement of the thermoplastic sheet or the shaped containers, and close to the female moulds in their lower position, and close to the shaping station.
Claim 12
Dependent Claim
103 words
An apparatus according to claim 1, characterized in that the loop forming device comprises a. a horizontal transversal bar mounted on a support plate which is integral with the frame of the apparatus, and provided with b. a certain number of cavities of which each is connected laterally to the exterior by a slot formed in a cutting blade mounted on a support which is movable transversely to the plane in which the reinforcing sheet is fed into the cavity, c. a fixed blade co-operating member being provided in each cavity in the wall located at least partially in alignment with the slot.
Claim 13
Dependent Claim
67 words
An apparatus according to claim 2, characterized in that the diameter of the feed-in rollers is slightly greater than that of the roller for entraining the reinforcing sheets, the feed-in rollers are driven individually by a friction system such as to permit the tensioning of each reinForcing sheet and the introduction of each reinforcing sheet into the cavity, each time that the apparatus is set in operation.
Claim 14
Dependent Claim
71 words
An apparatus according to claim 1, characterized in that the member for positioning the cut and loop-shape rolled reinforcing sheet comprises a plate of which the section is substantially identical to the section of the cavity, said plate being fixed to the end of a rod of which the other end is fixed by way of a strut to the rod of a second control jack fixed on a cross member.
Claim 15
Dependent Claim
74 words
An apparatus according to claim 1, characterized in that the moulds are grouped in two lines of moulds disposed such that, considered in the direction of advance movement of the thermoplastic sheet, there are always two moulds in alignment one behind the other, the pre-shaping punches, the mould clamps, the cavities of the loop forming device and the members for positioning the cut portion of reinforcing sheet being disposed similarly in two grouped lines.
Claim 16
Dependent Claim
58 words
An apparatus according to claim 14, characterized in that the access slots of the upper row of cavities are open upwardly and the corresponding feed-in rollers are disposed above the upper row of cavities, while the access slots of the lower row of cavities are open downwardly and the corresponding feed-in rollers are arranged below said lower row.
Claim 17
Dependent Claim
62 words
An apparatus according to claim 3, characterized in that each female mould is provided at certain locations with very fine suction channels which open on the one hand on to the inside lateral face of the mould and on the other hand, into a chamber formed in the said wall of the mould and capable of being connected to a vacuum pump.
Claim 18
Dependent Claim
40 words
An apparatus according to claim 1, characterized in that the openings of the suction channels are provided at locations on the inside wall of the mould at which that face affords changes in direction or more or less accentuated angles.
Claim 19
Dependent Claim
97 words
An apparatus according to claim 4, characterized in that the mechanism for cutting the main sheet into individual strips is of the punch and die type and is arranged such that the cut strips comprise successive portions which are integral with each other by way of at least a part of their front and rear ends, the straight lines delimiting the one and the other ends being parallel and the rearward straight line coinciding with a generating line of the container after the portion of reinforcing sheet has been secured to said container made in the mould.
Claim 20
Dependent Claim
84 words
An apparatus according to claim 1, characterized in that the axis of the return roller locates upstream of the feed-in rollers of the loop forming device is inclined relative to the edges of the cutting blades of said device, such that the rearward end of each portion of reinforcing sheet is parallel to the cutting blades and that the axial height of the cavities of the loop forming device is equal to at least twice the height or the width of the reinforcing sheet.
Claim 21
Dependent Claim
81 words
An apparatus according to claim 4, characterized in that the mechanism for cutting the main sheet into individual reinforcing strips is of the punch and die type and is arranged such that the cut strips comprise successive portions which are integral with each other by way of at least one part of their front and rear ends, the straight lines delimiting the one and the other ends being parallel and perpendicular to the direction of movement of the individual reinforcing strips.
Claim 22
Dependent Claim
37 words
An apparatus according to claim 20, characterized in that the rearward straight line coincides with a generating line of the container after the portion of reinforcing sheet has been secured to said container made in the mould.
Claim 23
Dependent Claim
39 words
An apparatus according to claim 20, characterized in that the rearward straight line forms an angle with a generating line of the container after the portion of reinforcing sheet has been secured to said container made in the mould.
Claim 24
Dependent Claim
29 words
An apparatus according to claim 1, characterized in that the inside wall of the female moulds is of a frustocOnical shape of which the large base is completely open.
Claim 25
Dependent Claim
66 words
In an apparatus for producing a container with composite walls from a sheet of thermoplastic material and a loop of reinforcing material, a. a female mold, b. a loop forming device located outside of said mold, c. means for temporarily aligning said mold axially with said loop forming device, and d. means for introducing a reinforcing loop formed in said loop forming device into said mold.
Claim 26
Dependent Claim
66 words
In an apparatus for producing a container with composite walls from a sheet of thermoplastic material and a loop of reinforcing material, a. a female mold, b. a loop forming device located outside of said mold, c. means for temporarily aligning said mold axially with said loop forming device, and d. means for introducing a reinforcing loop formed in said loop forming device into said mold.
Claim 27
Dependent Claim
46 words
An apparatus according to claim 24, wherein said loop forming device comprises a cavity having a slot in a side wall thereof and means for feeding a strip of reinforcing material through said slot and into said cavity in a direction transverse to the axis thereof.
Claim 28
Dependent Claim
26 words
An apparatus according to claim 24 wherein a preshaping punch cooperates with said female mold and said plastic sheet for initiating the formation of a container.
Claim 29
Dependent Claim
115 words
In an apparatus for producing a container with composite walls from a sheet of thermoplastic material and a loop of reinforcing material, a combination comprising a female mould; a loop forming device associated with said female mould and provided with a cavity bounded by a side wall having a slot formed therein; means for temporarily aligning said mould axially with said loop forming device; means for feeding a strip of reinforcing material through said slot and into said cavity in a direction transverse to the axis of the latter so as to form a reinforcing loop therein; and means for introducing the thus formed reinforcing loop from said loop forming device into said female mould.
Claim 30
Dependent Claim
115 words
In an apparatus for producing a container with composite walls from a sheet of thermoplastic material and a loop of reinforcing material, a combination comprising a female mould; a loop forming device associated with said female mould and provided with a cavity bounded by a side wall having a slot formed therein; means for temporarily aligning said mould axially with said loop forming device; means for feeding a strip of reinforcing material through said slot and into said cavity in a direction transverse to the axis of the latter so as to form a reinforcing loop therein; and means for introducing the thus formed reinforcing loop from said loop forming device into said female mould.
Claim 31
Dependent Claim
93 words
In an apparatus for producing a container with composite walls from a sheet of thermoplastic material and a loop of reinforcing material, a combination comprising a female mould; a loop forming device associated with said female mould; means for temporarily aligning said female mould axially with said loop forming device; means for introducing a reinforcing loop formed in said loop forming device into said mould; and a pre-shaping punch cooperating with said female mould for acting upon a plastic sheet associated with said mould so as to initiate the formation of a container.
Claim 32
Dependent Claim
93 words
In an apparatus for producing a container with composite walls from a sheet of thermoplastic material and a loop of reinforcing material, a combination comprising a female mould; a loop forming device associated with said female mould; means for temporarily aligning said female mould axially with said loop forming device; means for introducing a reinforcing loop formed in said loop forming device into said mould; and a pre-shaping punch cooperating with said female mould for acting upon a plastic sheet associated with said mould so as to initiate the formation of a container.
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |