Inhaler Articles Folded Ends Uniform Appearance

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Solution Overview

Problem

Inhaler articles with varying lengths due to manufacturing tolerances and positional variability on rotating drums result in uneven closed distal ends, affecting user insertion force and appearance, and increasing the risk of rupture.

Innovation Solution

A method involving a rotating drum with slot elements and movable end faces to align semifinished inhaler articles by moving them until their open distal ends contact an alignment element, ensuring uniform height and subsequent uniform closure, reducing manufacturing variability and enhancing production speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manufacturing tolerances in tubular element production are accepted, then production speed and ease of manufacture are improved, but variations in closed distal end appearance and insertion force occur

Engineering Contradiction:
Improveproduction speedVSAvoiduniformity of closed distal ends
Core Design Contradiction:
ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by aligning the tubular elements to a reference surface before the closing operation. This alignment step ensures that all tubular elements are positioned at the correct height and orientation prior to closing, compensating for length variations and preventing non-uniform closed ends. The alignment is performed in advance of the closing operation, allowing the closing mechanism to work on uniformly positioned elements.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If the distal end of the tubular element is bent more to close it, then the closure is more secure, but the force required by the user for insertion increases

Engineering Contradiction:
Improveclosure securityVSAvoiduser insertion force
Core Design Contradiction:
ReliabilityVSForce

Solution Approach 1:

The patent performs preliminary alignment of the tubular elements to a reference surface before closing. This ensures that the closing operation starts from a consistent, optimal position for each element, allowing the closing mechanism to achieve secure closure with minimal bending. By pre-positioning the elements correctly, the system avoids excessive bending that would increase insertion force.

Inventive Principle:
Principle #10Preliminary action

3Manufacturing precision

If manual alignment of semifinished articles is performed, then uniform appearance of closed ends is achieved, but production speed decreases

Engineering Contradiction:
Improveuniformity of closed distal endsVSAvoidproduction speed
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The patent implements self-service alignment where the tubular elements automatically align themselves to a reference surface through gravity or mechanical guidance features. The elements are fed into the closing mechanism in a predetermined orientation, and the reference surface passively guides them into the correct position without requiring active manual adjustment. This maintains high production speed while achieving uniform alignment.

Inventive Principle:
Principle #25Self-service

4Ease of manufacture

If the length of tubular elements is varied due to manufacturing tolerances, then ease of manufacture is improved, but the relative longitudinal positions on rotating drum become variable

Engineering Contradiction:
Improvetolerance acceptanceVSAvoidpositional consistency on drum
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent transitions from controlling length variations in one dimension to controlling positional variation in another dimension. Instead of attempting to maintain constant tubular element lengths, the system aligns all elements to a reference surface in the vertical dimension, thereby stabilizing their relative longitudinal positions on the rotating drum. This dimensional shift allows length tolerances while maintaining positional consistency.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20240306733A1Inhaler articles having folded ends with uniform appearance
Publication Date: 2024.09.19 PHILIP MORRIS PRODUCTS SA
  • US20240306733A1 patent drawing
  • US20240306733A1 patent drawing
  • US20240306733A1 patent drawing

AI summary

The invention relates to a method for manufacturing inhaler articles, comprising steps of providing a semifinished inhaler article, providing a rotating drum comprising a plurality of slot elements with movable end faces, inserting the semifinished inhaler article into a slot element, providing an alignment element in proximity to the semifinished inhaler article, moving the movable end face of the slot element against the proximal end of the semifinished inhaler article to push the semifinished inhaler article along its longitudinal axis until the open distal end of the semifinished inhaler article contacts the alignment element, fixing the movable end face in position, providing a closing station in proximity to the semifinished inhaler article, and at least partially closing the distal end of the semifinished inhaler article. The invention further relates to packages of inhaler articles, to a rotating drum, and to an apparatus for manufacturing inhaler articles.