Machine for packaging flat, unsymmetrical objects

• US 4,953,343 A
• Filed: 11/18/1988
• Issued: 09/04/1990
• Est. Priority Date: 03/26/1987
• Status: Expired due to Fees

• Current Assignee: Akerlund & Rausing Licens AB
• Original Assignee: Akerlund & Rausing Licens AB
• Inventors: Hellman, Stig
• Primary Examiner(s): Culver, Horace M.
• Application Number:
  US07/278,440
• Time in Patent Office: 655 Days
• Field of Search: 53/501, 53/539, 53/147, 53/525, 53/500, 53/544, 198/399, 198/382, 198/426, 198/453, 198/454
• US Class Current: 53/500
• CPC Class Codes: B65B 35/34 by agitators or vibrators
• CPC Class Codes: B65B 35/56 Orientating, i.e. changing the attitude of, articles, e.g. of non-uniform cross-section
• CPC Class Codes: B65B 5/101 by gravity B65B5/12 and B65B5/108 take precedence

Abstract

Apparatus for feeding a preselected number of unsymmetrical objects into a package has a vibratory transporter for feeding a predetermined number of objects to be packaged into a collector and a photoelectric device for releasing the objects from the collector into a package when the predetermined number of objects are in the collector. The transporter includes a discharge trough which is slopped to one side and has a fixed siderail and a resiliently yieldable siderail which prevent jamming of unsymmetrical objects within the trough. Tracks which feed objects from an object storage unit to the trough are arranged one above the other so that the unsymmetrical objects cannot enter the trough on edge or in stacked relation to each other.

Claims

1. Apparatus for packaging non-rotation-symmetrical objects with an exact preselected number of objects in each package, each object having at least one flat side on which the object is advanced, said apparatus comprising an object storage unit (1), a transport unit (3, 4, 5) for advancing objects received from the object storage unit (1) and having means (11, 13) for preventing objects from becoming jammed as the objects are advanced, a counting unit (22) for counting objects advanced by the transport unit (3, 4, 5), and a discharge unit (23, 24) for releasing a preselected number of objects advanced by the transport unit, characterized in that the transport unit (3, 4, 5) has means for preventing objects from being advanced one above another or on edge, the transport unit includes a front transport trough partially defined by opposing sidewalls and slopping toward one side, said sidewalls converging toward an output end having a width slightly larger than the largest dimension of an object to be packaged, said sidewalls including a fixed lower sidewall (12) and a resiliently yieldable upper sidewall (13), said upper sidewall (13) being outwardly yieldable when acted upon by objects in said trough.

2. Apparatus according to claim 1, characterized in that said discharge unit includes a collector (23, 24) for a definite counted number of objects, and control means for opening said collector when said definite number of objects is in said collector, whereby the objects are released down into an attached package (7).

3. Apparatus according to claim 2, characterized in that said discharge unit has a stop plunger (18) including a leaf spring (19) at its lower end, and means for projecting said stop plunger when a preselected number of objects have been released from said collector, said leaf spring pressing against the forwardmost object in said trough to hold said forwardmost object fast when said plunger is projected, and for retracting said plunger to release objects from said discharge unit into said collector (23, 24).

4. Apparatus according to claim 3, characterized in that said apparatus includes means for releasing objects from said collector when a predetermined number of objects are in said collector.

5. Apparatus according to claim 4, characterized in that said means for releasing objects from said collector comprises said means for projecting said stop plunger.

6. Apparatus as set forth in claim 3, characterized in that said means for projecting said plunger comprises a photoelectric cell (22) for marking by means of electrical impulses the number of passing objects.

7. Apparatus according to claim 3, characterized in that said apparatus includes a vibrating means for advancing articles in said transport unit and means for interrupting the operation of said vibrating means when said stop plunger is in its projected position.

8. Apparatus according to claim 1, characterized in that said transport unit includes an input channel (3) having a sloping bottom track (8) for receiving and advancing objects received from said storage unit (1), and a transfer track (4) for advancing objects received from said input channel (3) and sloping in a direction opposite to that of said input channel (3), said transfer track (4) extending inwardly below said channel (3), said means for preventing objects from being advanced one above another or on edge comprising the vertical spacing between the bottom (8) and an associated portion of said transfer track (4) below said bottom (8).

9. Apparatus according to claim 8, characterized in that one side of said transfer track (4) comprises a spring plate (11) which acts in the manner of a spring upon objects advanced on said transfer track (4).

10. Apparatus according to claim 8, characterized in that said transfer track (4) has one side formed by a spring plate (11) for acting in the manner of a spring upon objects on said track (4).

11. Apparatus according to claim 1, characterized in that said upper sidewall (13) comprises a spring plate fixed only at the beginning (14) and end (15) of said trough and formed with zig-zag-type outward bends (16).